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Beyond Big Data
Matthew J. SalganikDepartment of Sociology
Princeton University
AT&T Research SeminarDecember 11, 2016
Bit by Bit:Social Research in the Digital Age
Social Scientists ←→ Data Scientists
Isn’t computational social science a fad?
No
Isn’t computational social science a fad?
No
https://commons.wikimedia.org/wiki/File:Gartner_Hype_Cycle.svg
Social Scientists ←→ Data Scientists
+Readymades Custommades
https://commons.wikimedia.org/wiki/File:Duchamp_Fountaine.jpghttps://commons.wikimedia.org/wiki/File:%27David%27_by_Michelangelo_JBU0001.JPG
+Readymades Custommades
https://commons.wikimedia.org/wiki/File:Duchamp_Fountaine.jpghttps://commons.wikimedia.org/wiki/File:%27David%27_by_Michelangelo_JBU0001.JPG
+
Readymades Custommades
https://commons.wikimedia.org/wiki/File:Duchamp_Fountaine.jpghttps://commons.wikimedia.org/wiki/File:%27David%27_by_Michelangelo_JBU0001.JPG
+Readymades Custommades
https://commons.wikimedia.org/wiki/File:Duchamp_Fountaine.jpghttps://commons.wikimedia.org/wiki/File:%27David%27_by_Michelangelo_JBU0001.JPG
Key abstraction is research design
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
Why should I care about surveys?
Why should I care about surveys
in the age of big data?
I 10 times faster
I 50 times cheaper
I 10 times faster
I 50 times cheaper
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
Research Article
The Constructive, Destructive,and Reconstructive Power ofSocial NormsP. Wesley Schultz,1 Jessica M. Nolan,2 Robert B. Cialdini,3 Noah J. Goldstein,3 and Vladas Griskevicius3
1California State University, San Marcos; 2University of Arkansas; and 3Arizona State University
ABSTRACT—Despite a long tradition of effectiveness inlaboratory tests, normative messages have had mixedsuccess in changing behavior in field contexts, with somestudies showing boomerang effects. To test a theoreticalaccount of this inconsistency, we conducted a field exper-iment in which normative messages were used to promotehousehold energy conservation. As predicted, a descriptivenormative message detailing average neighborhood usageproduced either desirable energy savings or the undesir-able boomerang effect, depending on whether householdswere already consuming at a low or high rate. Also aspredicted, adding an injunctive message (conveying socialapproval or disapproval) eliminated the boomerangeffect. The results offer an explanation for the mixedsuccess of persuasive appeals based on social norms andsuggest how such appeals should be properly crafted.
After several decades of controversy over the role of norms in
predicting behavior, the research has clearly established thatsocial norms not only spur but also guide action in direct and
meaningful ways (Aarts & Dijksterhuis, 2003; Cialdini,Kallgren, & Reno, 1991; Darley & Latane, 1970; Goldstein,Cialdini, & Griskevicius, 2006; Kerr, 1995; Terry & Hogg,
2001). Given this asserted power of social norms, during the pastdecade there has been a surge of programs that have delivered
normative information as a primary tool for changing sociallysignificant behaviors, such as alcohol consumption, drug use,
disordered eating, gambling, littering, and recycling (e.g.,Donaldson, Graham, & Hansen, 1994; Larimer & Neighbors,2003;Neighbors, Larimer,&Lewis, 2004; Schultz, 1999; Schultz,
Tabanico, & Rendon, in press). Such social-norms marketingcampaigns have emerged as an alternative to more traditional
approaches (e.g., information campaigns, moral exhortation, fear-inducing messages) designed to reduce undesirable conduct
(Donaldson, Graham, Piccinin, & Hansen, 1995).The rationale for the social-norms marketing approach is
based on two consistent findings: (a) The majority of individuals
overestimate the prevalence of many undesirable behaviors,such as alcohol use among peers (e.g., Borsari & Carey, 2003;
Prentice & Miller, 1993), and (b) individuals use their percep-tions of peer norms as a standard against which to compare theirown behaviors (e.g., Baer, Stacy, & Larimer, 1991; Clapp &
McDonell, 2000; Perkins & Berkowitz, 1986). Social-normsmarketing campaigns seek to reduce the occurrence of delete-
rious behaviors by correcting targets’ misperceptions regardingthe behaviors’ prevalence. The perception of prevalence is
commonly referred to as the descriptive norm governing a be-havior (Cialdini et al., 1991).Social-norms marketing campaigns have been deemed so full
of promise that nearly half of 746 U.S. colleges and universitiessurveyed by the Harvard School of Public Health in 2002 had
adopted them in some form to combat collegiate binge drinking(Wechsler et al., 2003). However, despite the widespread
adoption of social-norms marketing campaigns, evidence for thesuccess of such programs has been surprisinglymixed. Althoughmany studies appear to confirm the effectiveness of the social
marketing approach (e.g., Agostinelli, Brown, & Miller, 1995;Haines & Spear, 1996; Neighbors et al., 2004), other studies
have failed to produce substantial changes in behavior (e.g.,Clapp, Lange, Russell, Shillington, & Voas, 2003; Granfield,2005; Peeler, Far, Miller, & Brigham, 2000; Russell, Clapp, &
DeJong, 2005;Werch et al., 2000). In fact, some studies indicatethat social-norms marketing campaigns have actually increased
the undesirable behaviors and misperceptions they set out todecrease (e.g., Perkins, Haines, & Rice, 2005; Wechsler et al.,
2003; Werch et al., 2000).
Address correspondence to Wesley Schultz, Department of Psy-chology, California State University, San Marcos, CA 92078, e-mail:[email protected].
PSYCHOLOGICAL SCIENCE
Volume 18—Number 5 429Copyright r 2007 Association for Psychological Science at PRINCETON UNIV LIBRARY on March 30, 2016pss.sagepub.comDownloaded from
Figures from Allcott (2011)
Figures from Allcott (2011)
Figures from Allcott (2011)
Allcott (2015) “Site selection bias in program evaluation” QuarterlyJournal of Economics.
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
http://dx.doi.org/10.1038/35057062
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B. Åsman,146a,146b,† L. Asquith,149,† K. Assamagan,25,† R. Astalos,144a,† M. Atkinson,165,† N. B. Atlay,141,† B. Auerbach,6,†
K. Augsten,128,† M. Aurousseau,145b,† G. Avolio,30,† B. Axen,15,† M. K. Ayoub,117,† G. Azuelos,95,e,† M. A. Baak,30,†
A. E. Baas,58a,† C. Bacci,134a,134b,† H. Bachacou,136,† K. Bachas,154,† M. Backes,30,† M. Backhaus,30,† E. Badescu,26a,†
P. Bagiacchi,132a,132b,† P. Bagnaia,132a,132b,† Y. Bai,33a,† T. Bain,35,† J. T. Baines,131,† O. K. Baker,176,† P. Balek,129,†
T. Balestri,148,† F. Balli,84,† E. Banas,39,† Sw. Banerjee,173,† A. A. E. Bannoura,175,† H. S. Bansil,18,† L. Barak,30,†
S. P. Baranov,96,† E. L. Barberio,88,† D. Barberis,50a,50b,† M. Barbero,85,† T. Barillari,101,† M. Barisonzi,164a,164b,†
T. Barklow,143,† N. Barlow,28,† S. L. Barnes,84,† B.M. Barnett,131,† R.M. Barnett,15,† Z. Barnovska,5,† A. Baroncelli,134a,†
G. Barone,49,† A. J. Barr,120,† F. Barreiro,82,† J. Barreiro Guimarães da Costa,57,† R. Bartoldus,143,† A. E. Barton,72,†
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-9
P. Bartos,144a,† A. Bassalat,117,† A. Basye,165,† R. L. Bates,53,† S. J. Batista,158,† J. R. Batley,28,† M. Battaglia,137,†
M. Bauce,132a,132b,† F. Bauer,136,† H. S. Bawa,143,f,† J. B. Beacham,111,† M. D. Beattie,72,† T. Beau,80,† P. H. Beauchemin,161,†
R. Beccherle,124a,124b,† P. Bechtle,21,† H. P. Beck,17,g,† K. Becker,120,† M. Becker,83,† S. Becker,100,† M. Beckingham,170,†
C. Becot,117,† A. J. Beddall,19c,† A. Beddall,19c,† V. A. Bednyakov,65,† C. P. Bee,148,† L. J. Beemster,107,† T. A. Beermann,175,†
M. Begel,25,† J. K. Behr,120,† C. Belanger-Champagne,87,† W. H. Bell,49,† G. Bella,153,† L. Bellagamba,20a,† A. Bellerive,29,†
M. Bellomo,86,† K. Belotskiy,98,† O. Beltramello,30,† O. Benary,153,† D. Benchekroun,135a,† M. Bender,100,†
K. Bendtz,146a,146b,† N. Benekos,10,† Y. Benhammou,153,† E. Benhar Noccioli,49,† J. A. Benitez Garcia,159b,†
D. P. Benjamin,45,† J. R. Bensinger,23,† S. Bentvelsen,107,† L. Beresford,120,† M. Beretta,47,† D. Berge,107,†
E. Bergeaas Kuutmann,166,† N. Berger,5,† F. Berghaus,169,† J. Beringer,15,† C. Bernard,22,† N. R. Bernard,86,† C. Bernius,110,†
F. U. Bernlochner,21,† T. Berry,77,† P. Berta,129,† C. Bertella,83,† G. Bertoli,146a,146b,† F. Bertolucci,124a,124b,† C. Bertsche,113,†
D. Bertsche,113,† M. I. Besana,91a,† G. J. Besjes,106,† O. Bessidskaia Bylund,146a,146b,† M. Bessner,42,† N. Besson,136,†
C. Betancourt,48,† S. Bethke,101,† A. J. Bevan,76,† W. Bhimji,46,† R.M. Bianchi,125,† L. Bianchini,23,† M. Bianco,30,†
O. Biebel,100,† S. P. Bieniek,78,† M. Biglietti,134a,† J. Bilbao De Mendizabal,49,† H. Bilokon,47,† M. Bindi,54,† S. Binet,117,†
A. Bingul,19c,† C. Bini,132a,132b,† C.W. Black,150,† J. E. Black,143,† K.M. Black,22,† D. Blackburn,138,† R. E. Blair,6,†
J.-B. Blanchard,136,† J. E. Blanco,77,† T. Blazek,144a,† I. Bloch,42,† C. Blocker,23,† W. Blum,83,a,† U. Blumenschein,54,†
G. J. Bobbink,107,† V. S. Bobrovnikov,109,d,† S. S. Bocchetta,81,† A. Bocci,45,† C. Bock,100,† M. Boehler,48,† J. A. Bogaerts,30,†
A. G. Bogdanchikov,109,† C. Bohm,146a,† V. Boisvert,77,† T. Bold,38a,† V. Boldea,26a,† A. S. Boldyrev,99,† M. Bomben,80,†
M. Bona,76,† M. Boonekamp,136,† A. Borisov,130,† G. Borissov,72,† S. Borroni,42,† J. Bortfeldt,100,† V. Bortolotto,60a–60c,†
K. Bos,107,† D. Boscherini,20a,† M. Bosman,12,† J. Boudreau,125,† J. Bouffard,2,† E. V. Bouhova-Thacker,72,†
D. Boumediene,34,† C. Bourdarios,117,† N. Bousson,114,† A. Boveia,30,† J. Boyd,30,† I. R. Boyko,65,† I. Bozic,13,†
J. Bracinik,18,† A. Brandt,8,† G. Brandt,54,† O. Brandt,58a,† U. Bratzler,156,† B. Brau,86,† J. E. Brau,116,† H.M. Braun,175,a,†
S. F. Brazzale,164a,164c,† K. Brendlinger,122,† A. J. Brennan,88,† L. Brenner,107,† R. Brenner,166,† S. Bressler,172,†
K. Bristow,145c,† T. M. Bristow,46,† D. Britton,53,† D. Britzger,42,† F. M. Brochu,28,† I. Brock,21,† R. Brock,90,† J. Bronner,101,†
G. Brooijmans,35,† T. Brooks,77,† W. K. Brooks,32b,† J. Brosamer,15,† E. Brost,116,† J. Brown,55,†
P. A. Bruckman de Renstrom,39,† D. Bruncko,144b,† R. Bruneliere,48,† A. Bruni,20a,† G. Bruni,20a,† M. Bruschi,20a,†
L. Bryngemark,81,† T. Buanes,14,† Q. Buat,142,† P. Buchholz,141,† A. G. Buckley,53,† S. I. Buda,26a,† I. A. Budagov,65,†
F. Buehrer,48,† L. Bugge,119,† M. K. Bugge,119,† O. Bulekov,98,† D. Bullock,8,† H. Burckhart,30,† S. Burdin,74,†
B. Burghgrave,108,† S. Burke,131,† I. Burmeister,43,† E. Busato,34,† D. Büscher,48,† V. Büscher,83,† P. Bussey,53,†
C. P. Buszello,166,† J. M. Butler,22,† A. I. Butt,3,† C.M. Buttar,53,† J. M. Butterworth,78,† P. Butti,107,† W. Buttinger,25,†
A. Buzatu,53,† R. Buzykaev,109,d,† S. Cabrera Urbán,167,† D. Caforio,128,† V.M. Cairo,37a,37b,† O. Cakir,4a,† P. Calafiura,15,†
A. Calandri,136,† G. Calderini,80,† P. Calfayan,100,† L. P. Caloba,24a,† D. Calvet,34,† S. Calvet,34,† R. Camacho Toro,31,†
S. Camarda,42,† P. Camarri,133a,133b,† D. Cameron,119,† L.M. Caminada,15,† R. Caminal Armadans,12,† S. Campana,30,†
M. Campanelli,78,† A. Campoverde,148,† V. Canale,104a,104b,† A. Canepa,159a,† M. Cano Bret,76,† J. Cantero,82,†
R. Cantrill,126a,† T. Cao,40,† M. D.M. Capeans Garrido,30,† I. Caprini,26a,† M. Caprini,26a,† M. Capua,37a,37b,† R. Caputo,83,†
R. Cardarelli,133a,† T. Carli,30,†G. Carlino,104a,† L. Carminati,91a,91b,† S. Caron,106,† E. Carquin,32a,†G. D. Carrillo-Montoya,8,†
J. R. Carter,28,† J. Carvalho,126a,126c,† D. Casadei,78,† M. P. Casado,12,† M. Casolino,12,† E. Castaneda-Miranda,145b,†
A. Castelli,107,† V. Castillo Gimenez,167,† N. F. Castro,126a,h,† P. Catastini,57,† A. Catinaccio,30,† J. R. Catmore,119,†
A. Cattai,30,† J. Caudron,83,† V. Cavaliere,165,† D. Cavalli,91a,† M. Cavalli-Sforza,12,† V. Cavasinni,124a,124b,†
F. Ceradini,134a,134b,† B. C. Cerio,45,†K. Cerny,129,† A. S. Cerqueira,24b,†A. Cerri,149,† L. Cerrito,76,† F. Cerutti,15,† M. Cerv,30,†
A. Cervelli,17,† S. A. Cetin,19b,† A. Chafaq,135a,† D. Chakraborty,108,† I. Chalupkova,129,† P. Chang,165,† B. Chapleau,87,†
J. D. Chapman,28,† D. G. Charlton,18,† C. C. Chau,158,† C. A. Chavez Barajas,149,† S. Cheatham,152,† A. Chegwidden,90,†
S. Chekanov,6,† S. V. Chekulaev,159a,† G. A. Chelkov,65,i,† M. A. Chelstowska,89,† C. Chen,64,† H. Chen,25,† K. Chen,148,†
L. Chen,33d,j,† S. Chen,33c,† X. Chen,33f,† Y. Chen,67,†H. C. Cheng,89,†Y. Cheng,31,†A. Cheplakov,65,† E. Cheremushkina,130,†
R. Cherkaoui El Moursli,135e,† V. Chernyatin,25,a,† E. Cheu,7,† L. Chevalier,136,† V. Chiarella,47,† J. T. Childers,6,†
G. Chiodini,73a,† A. S. Chisholm,18,† R. T. Chislett,78,† A. Chitan,26a,† M. V. Chizhov,65,† K. Choi,61,† S. Chouridou,9,†
B. K. B. Chow,100,† V. Christodoulou,78,† D. Chromek-Burckhart,30,† M. L. Chu,151,† J. Chudoba,127,† A. J. Chuinard,87,†
J. J. Chwastowski,39,† L. Chytka,115,† G. Ciapetti,132a,132b,† A. K. Ciftci,4a,† D. Cinca,53,† V. Cindro,75,† I. A. Cioara,21,†
A. Ciocio,15,† Z. H. Citron,172,† M. Ciubancan,26a,† A. Clark,49,† B. L. Clark,57,† P. J. Clark,46,† R. N. Clarke,15,†
W. Cleland,125,† C. Clement,146a,146b,† Y. Coadou,85,† M. Cobal,164a,164c,† A. Coccaro,138,† J. Cochran,64,† L. Coffey,23,†
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-10
J. G. Cogan,143,† B. Cole,35,† S. Cole,108,† A. P. Colijn,107,† J. Collot,55,† T. Colombo,58c,† G. Compostella,101,†
P. Conde Muiño,126a,126b,† E. Coniavitis,48,† S. H. Connell,145b,† I. A. Connelly,77,† S.M. Consonni,91a,91b,† V. Consorti,48,†
S. Constantinescu,26a,† C. Conta,121a,121b,† G. Conti,30,† F. Conventi,104a,k,† M. Cooke,15,† B. D. Cooper,78,†
A.M. Cooper-Sarkar,120,† T. Cornelissen,175,† M. Corradi,20a,† F. Corriveau,87,l,† A. Corso-Radu,163,† A. Cortes-Gonzalez,12,†
G. Cortiana,101,† G. Costa,91a,† M. J. Costa,167,† D. Costanzo,139,† D. Côté,8,† G. Cottin,28,† G. Cowan,77,† B. E. Cox,84,†
K. Cranmer,110,† G. Cree,29,† S. Crépé-Renaudin,55,† F. Crescioli,80,† W.A. Cribbs,146a,146b,† M. Crispin Ortuzar,120,†
M. Cristinziani,21,† V. Croft,106,† G. Crosetti,37a,37b,† T. Cuhadar Donszelmann,139,† J. Cummings,176,† M. Curatolo,47,†
C. Cuthbert,150,† H. Czirr,141,† P. Czodrowski,3,† S. D’Auria,53,† M. D’Onofrio,74,†
M. J. Da Cunha Sargedas De Sousa,126a,126b,† C. Da Via,84,† W. Dabrowski,38a,† A. Dafinca,120,† T. Dai,89,† O. Dale,14,†
F. Dallaire,95,† C. Dallapiccola,86,† M. Dam,36,† J. R. Dandoy,31,† N. P. Dang,48,† A. C. Daniells,18,† M. Danninger,168,†
M. Dano Hoffmann,136,† V. Dao,48,† G. Darbo,50a,† S. Darmora,8,† J. Dassoulas,3,† A. Dattagupta,61,† W. Davey,21,†
C. David,169,† T. Davidek,129,† E. Davies,120,m,† M. Davies,153,† P. Davison,78,† Y. Davygora,58a,† E. Dawe,88,† I. Dawson,139,†
R. K. Daya-Ishmukhametova,86,† K. De,8,† R. de Asmundis,104a,† S. De Castro,20a,20b,† S. De Cecco,80,† N. De Groot,106,†
P. de Jong,107,† H. De la Torre,82,† F. De Lorenzi,64,† L. De Nooij,107,† D. De Pedis,132a,† A. De Salvo,132a,† U. De Sanctis,149,†
A. De Santo,149,† J. B. De Vivie De Regie,117,† W. J. Dearnaley,72,† R. Debbe,25,† C. Debenedetti,137,† D. V. Dedovich,65,†
I. Deigaard,107,† J. Del Peso,82,† T. Del Prete,124a,124b,† D. Delgove,117,† F. Deliot,136,† C.M. Delitzsch,49,† M. Deliyergiyev,75,†
A. Dell’Acqua,30,† L. Dell’Asta,22,† M. Dell’Orso,124a,124b,† M. Della Pietra,104a,k,† D. della Volpe,49,† M. Delmastro,5,†
P. A. Delsart,55,† C. Deluca,107,† D. A. DeMarco,158,† S. Demers,176,† M. Demichev,65,† A. Demilly,80,† S. P. Denisov,130,†
D. Derendarz,39,† J. E. Derkaoui,135d,† F. Derue,80,† P. Dervan,74,† K. Desch,21,† C. Deterre,42,† P. O. Deviveiros,30,†
A. Dewhurst,131,† S. Dhaliwal,107,†A. Di Ciaccio,133a,133b,† L. Di Ciaccio,5,†A. Di Domenico,132a,132b,† C. Di Donato,104a,104b,†
A. Di Girolamo,30,† B. Di Girolamo,30,† A. Di Mattia,152,† B. Di Micco,134a,134b,† R. Di Nardo,47,† A. Di Simone,48,†
R. Di Sipio,158,† D. Di Valentino,29,† C. Diaconu,85,† M. Diamond,158,† F. A. Dias,46,† M. A. Diaz,32a,† E. B. Diehl,89,†
J. Dietrich,16,† S. Diglio,85,† A. Dimitrievska,13,† J. Dingfelder,21,† P. Dita,26a,† S. Dita,26a,† F. Dittus,30,† F. Djama,85,†
T. Djobava,51b,† J. I. Djuvsland,58a,† M. A. B. do Vale,24c,† D. Dobos,30,† M. Dobre,26a,† C. Doglioni,49,† T. Dohmae,155,†
J. Dolejsi,129,† Z. Dolezal,129,† B. A. Dolgoshein,98,a,† M. Donadelli,24d,† S. Donati,124a,124b,† P. Dondero,121a,121b,†
J. Donini,34,† J. Dopke,131,† A. Doria,104a,† M. T. Dova,71,† A. T. Doyle,53,† E. Drechsler,54,† M. Dris,10,† E. Dubreuil,34,†
E. Duchovni,172,† G. Duckeck,100,† O. A. Ducu,26a,85,† D. Duda,175,† A. Dudarev,30,† L. Duflot,117,† L. Duguid,77,†
M. Dührssen,30,† M. Dunford,58a,† H. Duran Yildiz,4a,† M. Düren,52,† A. Durglishvili,51b,† D. Duschinger,44,† M. Dyndal,38a,†
C. Eckardt,42,† K.M. Ecker,101,† R. C. Edgar,89,† W. Edson,2,† N. C. Edwards,46,† W. Ehrenfeld,21,† T. Eifert,30,† G. Eigen,14,†
K. Einsweiler,15,† T. Ekelof,166,† M. El Kacimi,135c,† M. Ellert,166,† S. Elles,5,† F. Ellinghaus,83,† A. A. Elliot,169,† N. Ellis,30,†
J. Elmsheuser,100,† M. Elsing,30,† D. Emeliyanov,131,† Y. Enari,155,† O. C. Endner,83,† M. Endo,118,† R. Engelmann,148,†
J. Erdmann,43,† A. Ereditato,17,† G. Ernis,175,† J. Ernst,2,† M. Ernst,25,† S. Errede,165,† E. Ertel,83,† M. Escalier,117,† H. Esch,43,†
C. Escobar,125,† B. Esposito,47,†A. I. Etienvre,136,† E. Etzion,153,†H. Evans,61,†A. Ezhilov,123,† L. Fabbri,20a,20b,†G. Facini,31,†
R.M. Fakhrutdinov,130,† S. Falciano,132a,† R. J. Falla,78,† J. Faltova,129,† Y. Fang,33a,† M. Fanti,91a,91b,† A. Farbin,8,†
A. Farilla,134a,† T. Farooque,12,† S. Farrell,15,† S. M. Farrington,170,† P. Farthouat,30,† F. Fassi,135e,† P. Fassnacht,30,†
D. Fassouliotis,9,† M. Faucci Giannelli,77,† A. Favareto,50a,50b,† L. Fayard,117,† P. Federic,144a,† O. L. Fedin,123,n,†
W. Fedorko,168,† S. Feigl,30,† L. Feligioni,85,† C. Feng,33d,† E. J. Feng,6,† H. Feng,89,† A. B. Fenyuk,130,†
P. Fernandez Martinez,167,† S. Fernandez Perez,30,† S. Ferrag,53,† J. Ferrando,53,†A. Ferrari,166,† P. Ferrari,107,† R. Ferrari,121a,†
D. E. Ferreira de Lima,53,† A. Ferrer,167,† D. Ferrere,49,† C. Ferretti,89,† A. Ferretto Parodi,50a,50b,† M. Fiascaris,31,†
F. Fiedler,83,† A. Filipčič,75,† M. Filipuzzi,42,† F. Filthaut,106,† M. Fincke-Keeler,169,† K. D. Finelli,150,†
M. C. N. Fiolhais,126a,126c,† L. Fiorini,167,† A. Firan,40,† A. Fischer,2,† C. Fischer,12,† J. Fischer,175,† W. C. Fisher,90,†
E. A. Fitzgerald,23,† M. Flechl,48,† I. Fleck,141,† P. Fleischmann,89,† S. Fleischmann,175,† G. T. Fletcher,139,† G. Fletcher,76,†
T. Flick,175,† A. Floderus,81,† L. R. Flores Castillo,60a,† M. J. Flowerdew,101,† A. Formica,136,† A. Forti,84,† D. Fournier,117,†
H. Fox,72,† S. Fracchia,12,† P. Francavilla,80,† M. Franchini,20a,20b,† D. Francis,30,† L. Franconi,119,† M. Franklin,57,†
M. Fraternali,121a,121b,† D. Freeborn,78,† S. T. French,28,† F. Friedrich,44,† D. Froidevaux,30,† J. A. Frost,120,† C. Fukunaga,156,†
E. Fullana Torregrosa,83,† B. G. Fulsom,143,† J. Fuster,167,† C. Gabaldon,55,† O. Gabizon,175,† A. Gabrielli,20a,20b,†
A. Gabrielli,132a,132b,† S. Gadatsch,107,† S. Gadomski,49,† G. Gagliardi,50a,50b,† P. Gagnon,61,† C. Galea,106,†
B. Galhardo,126a,126c,† E. J. Gallas,120,† B. J. Gallop,131,† P. Gallus,128,† G. Galster,36,† K. K. Gan,111,† J. Gao,33b,85,† Y. Gao,46,†
Y. S. Gao,143,f,† F. M. Garay Walls,46,† F. Garberson,176,† C. García,167,† J. E. García Navarro,167,† M. Garcia-Sciveres,15,†
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-11
R.W. Gardner,31,† N. Garelli,143,† V. Garonne,119,† C. Gatti,47,† A. Gaudiello,50a,50b,† G. Gaudio,121a,† B. Gaur,141,†
L. Gauthier,95,† P. Gauzzi,132a,132b,† I. L. Gavrilenko,96,† C. Gay,168,† G. Gaycken,21,† E. N. Gazis,10,† P. Ge,33d,† Z. Gecse,168,†
C. N. P. Gee,131,† D. A. A. Geerts,107,† Ch. Geich-Gimbel,21,† M. P. Geisler,58a,† C. Gemme,50a,† M. H. Genest,55,†
S. Gentile,132a,132b,† M. George,54,† S. George,77,† D. Gerbaudo,163,† A. Gershon,153,† H. Ghazlane,135b,† B. Giacobbe,20a,†
S. Giagu,132a,132b,† V. Giangiobbe,12,† P. Giannetti,124a,124b,† B. Gibbard,25,† S. M. Gibson,77,† M. Gilchriese,15,†
T. P. S. Gillam,28,† D. Gillberg,30,† G. Gilles,34,† D.M. Gingrich,3,e,† N. Giokaris,9,† M. P. Giordani,164a,164c,† F. M. Giorgi,20a,†
F.M. Giorgi,16,† P. F. Giraud,136,† P. Giromini,47,† D. Giugni,91a,† C. Giuliani,48,† M. Giulini,58b,† B. K. Gjelsten,119,†
S. Gkaitatzis,154,† I. Gkialas,154,† E. L. Gkougkousis,117,† L. K. Gladilin,99,† C. Glasman,82,† J. Glatzer,30,†
P. C. F. Glaysher,46,† A. Glazov,42,† M. Goblirsch-Kolb,101,† J. R. Goddard,76,† J. Godlewski,39,† S. Goldfarb,89,†
T. Golling,49,† D. Golubkov,130,† A. Gomes,126a,126b,126d,† R. Gonçalo,126a,† J. Goncalves Pinto Firmino Da Costa,136,†
L. Gonella,21,† S. González de la Hoz,167,† G. Gonzalez Parra,12,† S. Gonzalez-Sevilla,49,† L. Goossens,30,†
P. A. Gorbounov,97,† H. A. Gordon,25,† I. Gorelov,105,† B. Gorini,30,† E. Gorini,73a,73b,† A. Gorišek,75,† E. Gornicki,39,†
A. T. Goshaw,45,† C. Gössling,43,† M. I. Gostkin,65,† D. Goujdami,135c,† A. G. Goussiou,138,† N. Govender,145b,†
H.M. X. Grabas,137,† L. Graber,54,† I. Grabowska-Bold,38a,† P. Grafström,20a,20b,† K-J. Grahn,42,† J. Gramling,49,†
E. Gramstad,119,† S. Grancagnolo,16,† V. Grassi,148,† V. Gratchev,123,† H.M. Gray,30,† E. Graziani,134a,† Z. D. Greenwood,79,o,†
K. Gregersen,78,† I. M. Gregor,42,† P. Grenier,143,† J. Griffiths,8,† A. A. Grillo,137,† K. Grimm,72,† S. Grinstein,12,p,†
Ph. Gris,34,† J.-F. Grivaz,117,† J. P. Grohs,44,† A. Grohsjean,42,† E. Gross,172,† J. Grosse-Knetter,54,† G. C. Grossi,79,†
Z. J. Grout,149,† L. Guan,33b,† J. Guenther,128,† F. Guescini,49,† D. Guest,176,† O. Gueta,153,† E. Guido,50a,50b,† T. Guillemin,117,†
S. Guindon,2,† U. Gul,53,† C. Gumpert,44,† J. Guo,33e,† S. Gupta,120,† P. Gutierrez,113,† N. G. Gutierrez Ortiz,53,†
C. Gutschow,44,† C. Guyot,136,† C. Gwenlan,120,† C. B. Gwilliam,74,† A. Haas,110,† C. Haber,15,† H. K. Hadavand,8,†
N. Haddad,135e,† P. Haefner,21,† S. Hageböck,21,† Z. Hajduk,39,† H. Hakobyan,177,† M. Haleem,42,† J. Haley,114,† D. Hall,120,†
G. Halladjian,90,† G. D. Hallewell,85,† K. Hamacher,175,† P. Hamal,115,† K. Hamano,169,† M. Hamer,54,† A. Hamilton,145a,†
G. N. Hamity,145c,† P. G. Hamnett,42,† L. Han,33b,† K. Hanagaki,118,† K. Hanawa,155,† M. Hance,15,† P. Hanke,58a,†
R. Hanna,136,† J. B. Hansen,36,† J. D. Hansen,36,† M. C. Hansen,21,† P. H. Hansen,36,† K. Hara,160,† A. S. Hard,173,†
T. Harenberg,175,† F. Hariri,117,† S. Harkusha,92,† R. D. Harrington,46,† P. F. Harrison,170,† F. Hartjes,107,† M. Hasegawa,67,†
S. Hasegawa,103,† Y. Hasegawa,140,† A. Hasib,113,† S. Hassani,136,† S. Haug,17,† R. Hauser,90,† L. Hauswald,44,†
M. Havranek,127,† C.M. Hawkes,18,† R. J. Hawkings,30,† A. D. Hawkins,81,† T. Hayashi,160,† D. Hayden,90,† C. P. Hays,120,†
J. M. Hays,76,† H. S. Hayward,74,† S. J. Haywood,131,† S. J. Head,18,† T. Heck,83,† V. Hedberg,81,† L. Heelan,8,† S. Heim,122,†
T. Heim,175,† B. Heinemann,15,† L. Heinrich,110,† J. Hejbal,127,† L. Helary,22,† S. Hellman,146a,146b,† D. Hellmich,21,†
C. Helsens,30,† J. Henderson,120,† R. C.W. Henderson,72,† Y. Heng,173,† C. Hengler,42,† A. Henrichs,176,†
A.M. Henriques Correia,30,† S. Henrot-Versille,117,† G. H. Herbert,16,† Y. Hernández Jiménez,167,† R. Herrberg-Schubert,16,†
G. Herten,48,† R. Hertenberger,100,† L. Hervas,30,† G. G. Hesketh,78,† N. P. Hessey,107,† J. W. Hetherly,40,† R. Hickling,76,†
E. Higón-Rodriguez,167,† E. Hill,169,† J. C. Hill,28,† K. H. Hiller,42,† S. J. Hillier,18,† I. Hinchliffe,15,† E. Hines,122,†
R. R. Hinman,15,† M. Hirose,157,† D. Hirschbuehl,175,† J. Hobbs,148,† N. Hod,107,† M. C. Hodgkinson,139,† P. Hodgson,139,†
A. Hoecker,30,† M. R. Hoeferkamp,105,† F. Hoenig,100,† M. Hohlfeld,83,† D. Hohn,21,† T. R. Holmes,15,† T. M. Hong,122,†
L. Hooft van Huysduynen,110,† W. H. Hopkins,116,† Y. Horii,103,† A. J. Horton,142,† J-Y. Hostachy,55,† S. Hou,151,†
A. Hoummada,135a,† J. Howard,120,† J. Howarth,42,† M. Hrabovsky,115,† I. Hristova,16,† J. Hrivnac,117,† T. Hryn’ova,5,†
A. Hrynevich,93,† C. Hsu,145c,† P. J. Hsu,151,q,† S.-C. Hsu,138,† D. Hu,35,† Q. Hu,33b,† X. Hu,89,† Y. Huang,42,† Z. Hubacek,30,†
F. Hubaut,85,† F. Huegging,21,† T. B. Huffman,120,† E.W. Hughes,35,† G. Hughes,72,† M. Huhtinen,30,† T. A. Hülsing,83,†
N. Huseynov,65,c,† J. Huston,90,† J. Huth,57,† G. Iacobucci,49,† G. Iakovidis,25,† I. Ibragimov,141,† L. Iconomidou-Fayard,117,†
E. Ideal,176,† Z. Idrissi,135e,† P. Iengo,30,† O. Igonkina,107,† T. Iizawa,171,† Y. Ikegami,66,† K. Ikematsu,141,† M. Ikeno,66,†
Y. Ilchenko,31,r,† D. Iliadis,154,† N. Ilic,143,† Y. Inamaru,67,† T. Ince,101,† P. Ioannou,9,† M. Iodice,134a,† K. Iordanidou,35,†
V. Ippolito,57,† A. Irles Quiles,167,† C. Isaksson,166,† M. Ishino,68,† M. Ishitsuka,157,† R. Ishmukhametov,111,† C. Issever,120,†
S. Istin,19a,† J. M. Iturbe Ponce,84,† R. Iuppa,133a,133b,† J. Ivarsson,81,† W. Iwanski,39,† H. Iwasaki,66,† J. M. Izen,41,†
V. Izzo,104a,† S. Jabbar,3,† B. Jackson,122,† M. Jackson,74,† P. Jackson,1,† M. R. Jaekel,30,† V. Jain,2,† K. Jakobs,48,†
S. Jakobsen,30,† T. Jakoubek,127,† J. Jakubek,128,† D. O. Jamin,151,† D. K. Jana,79,† E. Jansen,78,† R.W. Jansky,62,†
J. Janssen,21,† M. Janus,170,† G. Jarlskog,81,† N. Javadov,65,c,† T. Javůrek,48,† L. Jeanty,15,† J. Jejelava,51a,s,† G.-Y. Jeng,150,†
D. Jennens,88,† P. Jenni,48,t,† J. Jentzsch,43,† C. Jeske,170,† S. Jézéquel,5,† H. Ji,173,† J. Jia,148,† Y. Jiang,33b,† S. Jiggins,78,†
J. Jimenez Pena,167,† S. Jin,33a,† A. Jinaru,26a,† O. Jinnouchi,157,† M. D. Joergensen,36,† P. Johansson,139,† K. A. Johns,7,†
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-12
K. Jon-And,146a,146b,† G. Jones,170,† R.W. L. Jones,72,† T. J. Jones,74,† J. Jongmanns,58a,† P. M. Jorge,126a,126b,† K. D. Joshi,84,†
J. Jovicevic,159a,† X. Ju,173,† C. A. Jung,43,† P. Jussel,62,† A. Juste Rozas,12,p,† M. Kaci,167,† A. Kaczmarska,39,† M. Kado,117,†
H. Kagan,111,† M. Kagan,143,† S. J. Kahn,85,† E. Kajomovitz,45,† C.W. Kalderon,120,† S. Kama,40,† A. Kamenshchikov,130,†
N. Kanaya,155,† M. Kaneda,30,† S. Kaneti,28,† V. A. Kantserov,98,† J. Kanzaki,66,† B. Kaplan,110,† A. Kapliy,31,† D. Kar,53,†
K. Karakostas,10,† A. Karamaoun,3,† N. Karastathis,10,107,† M. J. Kareem,54,† M. Karnevskiy,83,† S. N. Karpov,65,†
Z.M. Karpova,65,† K. Karthik,110,† V. Kartvelishvili,72,† A. N. Karyukhin,130,† L. Kashif,173,† R. D. Kass,111,† A. Kastanas,14,†
Y. Kataoka,155,† A. Katre,49,† J. Katzy,42,† K. Kawagoe,70,† T. Kawamoto,155,† G. Kawamura,54,† S. Kazama,155,†
V. F. Kazanin,109,d,† M. Y. Kazarinov,65,† R. Keeler,169,† R. Kehoe,40,† J. S. Keller,42,† J. J. Kempster,77,† H. Keoshkerian,84,†
O. Kepka,127,† B. P. Kerševan,75,† S. Kersten,175,† R. A. Keyes,87,† F. Khalil-zada,11,† H. Khandanyan,146a,146b,†
A. Khanov,114,† A. G. Kharlamov,109,d,† T. J. Khoo,28,† V. Khovanskiy,97,† E. Khramov,65,† J. Khubua,51b,u,† H. Y. Kim,8,†
H. Kim,146a,146b,† S. H. Kim,160,† Y. Kim,31,† N. Kimura,154,† O.M. Kind,16,† B. T. King,74,† M. King,167,† R. S. B. King,120,†
S. B. King,168,† J. Kirk,131,† A. E. Kiryunin,101,† T. Kishimoto,67,† D. Kisielewska,38a,† F. Kiss,48,† K. Kiuchi,160,†
O. Kivernyk,136,† E. Kladiva,144b,† M. H. Klein,35,† M. Klein,74,† U. Klein,74,† K. Kleinknecht,83,† P. Klimek,146a,146b,†
A. Klimentov,25,† R. Klingenberg,43,† J. A. Klinger,84,† T. Klioutchnikova,30,† E.-E. Kluge,58a,† P. Kluit,107,† S. Kluth,101,†
E. Kneringer,62,† E. B. F. G. Knoops,85,† A. Knue,53,† A. Kobayashi,155,† D. Kobayashi,157,† T. Kobayashi,155,† M. Kobel,44,†
M. Kocian,143,† P. Kodys,129,† T. Koffas,29,† E. Koffeman,107,† L. A. Kogan,120,† S. Kohlmann,175,† Z. Kohout,128,†
T. Kohriki,66,† T. Koi,143,† H. Kolanoski,16,† I. Koletsou,5,† A. A. Komar,96,a,† Y. Komori,155,† T. Kondo,66,†
N. Kondrashova,42,† K. Köneke,48,† A. C. König,106,† S. König,83,† T. Kono,66,v,† R. Konoplich,110,w,† N. Konstantinidis,78,†
R. Kopeliansky,152,† S. Koperny,38a,† L. Köpke,83,† A. K. Kopp,48,† K. Korcyl,39,† K. Kordas,154,† A. Korn,78,†
A. A. Korol,109,d,† I. Korolkov,12,† E. V. Korolkova,139,† O. Kortner,101,† S. Kortner,101,† T. Kosek,129,† V. V. Kostyukhin,21,†
V.M. Kotov,65,† A. Kotwal,45,† A. Kourkoumeli-Charalampidi,154,† C. Kourkoumelis,9,† V. Kouskoura,25,†
A. Koutsman,159a,† R. Kowalewski,169,† T. Z. Kowalski,38a,† W. Kozanecki,136,† A. S. Kozhin,130,† V. A. Kramarenko,99,†
G. Kramberger,75,† D. Krasnopevtsev,98,† A. Krasznahorkay,30,† J. K. Kraus,21,† A. Kravchenko,25,† S. Kreiss,110,†
M. Kretz,58c,† J. Kretzschmar,74,† K. Kreutzfeldt,52,† P. Krieger,158,† K. Krizka,31,† K. Kroeninger,43,† H. Kroha,101,†
J. Kroll,122,† J. Kroseberg,21,† J. Krstic,13,† U. Kruchonak,65,† H. Krüger,21,† N. Krumnack,64,† Z. V. Krumshteyn,65,†
A. Kruse,173,† M. C. Kruse,45,† M. Kruskal,22,† T. Kubota,88,† H. Kucuk,78,† S. Kuday,4b,† S. Kuehn,48,† A. Kugel,58c,†
F. Kuger,174,† A. Kuhl,137,† T. Kuhl,42,† V. Kukhtin,65,† Y. Kulchitsky,92,† S. Kuleshov,32b,† M. Kuna,132a,132b,† T. Kunigo,68,†
A. Kupco,127,† H. Kurashige,67,† Y. A. Kurochkin,92,† R. Kurumida,67,† V. Kus,127,† E. S. Kuwertz,169,† M. Kuze,157,†
J. Kvita,115,† T. Kwan,169,† D. Kyriazopoulos,139,† A. La Rosa,49,† J. L. La Rosa Navarro,24d,† L. La Rotonda,37a,37b,†
C. Lacasta,167,† F. Lacava,132a,132b,† J. Lacey,29,† H. Lacker,16,† D. Lacour,80,† V. R. Lacuesta,167,† E. Ladygin,65,† R. Lafaye,5,†
B. Laforge,80,† T. Lagouri,176,† S. Lai,48,† L. Lambourne,78,† S. Lammers,61,† C. L. Lampen,7,† W. Lampl,7,† E. Lançon,136,†
U. Landgraf,48,† M. P. J. Landon,76,† V. S. Lang,58a,† J. C. Lange,12,† A. J. Lankford,163,† F. Lanni,25,† K. Lantzsch,30,†
S. Laplace,80,† C. Lapoire,30,† J. F. Laporte,136,† T. Lari,91a,† F. Lasagni Manghi,20a,20b,† M. Lassnig,30,† P. Laurelli,47,†
W. Lavrijsen,15,† A. T. Law,137,† P. Laycock,74,† O. Le Dortz,80,† E. Le Guirriec,85,† E. Le Menedeu,12,† M. LeBlanc,169,†
T. LeCompte,6,† F. Ledroit-Guillon,55,† C. A. Lee,145b,† S. C. Lee,151,† L. Lee,1,† G. Lefebvre,80,† M. Lefebvre,169,†
F. Legger,100,† C. Leggett,15,† A. Lehan,74,† G. Lehmann Miotto,30,† X. Lei,7,† W. A. Leight,29,† A. Leisos,154,†
A. G. Leister,176,† M. A. L. Leite,24d,† R. Leitner,129,† D. Lellouch,172,† B. Lemmer,54,† K. J. C. Leney,78,† T. Lenz,21,†
B. Lenzi,30,† R. Leone,7,† S. Leone,124a,124b,† C. Leonidopoulos,46,† S. Leontsinis,10,† C. Leroy,95,† C. G. Lester,28,†
M. Levchenko,123,† J. Levêque,5,† D. Levin,89,† L. J. Levinson,172,† M. Levy,18,† A. Lewis,120,† A.M. Leyko,21,†
M. Leyton,41,† B. Li,33b,x,† H. Li,148,† H. L. Li,31,† L. Li,45,† L. Li,33e,† S. Li,45,† Y. Li,33c,y,† Z. Liang,137,† H. Liao,34,†
B. Liberti,133a,† A. Liblong,158,† P. Lichard,30,† K. Lie,165,† J. Liebal,21,† W. Liebig,14,† C. Limbach,21,† A. Limosani,150,†
S. C. Lin,151,z,† T. H. Lin,83,† F. Linde,107,† B. E. Lindquist,148,† J. T. Linnemann,90,† E. Lipeles,122,† A. Lipniacka,14,†
M. Lisovyi,58b,† T. M. Liss,165,† D. Lissauer,25,† A. Lister,168,† A.M. Litke,137,† B. Liu,151,aa,† D. Liu,151,† J. Liu,85,†
J. B. Liu,33b,† K. Liu,85,† L. Liu,165,† M. Liu,45,† M. Liu,33b,† Y. Liu,33b,† M. Livan,121a,121b,† A. Lleres,55,†
J. Llorente Merino,82,† S. L. Lloyd,76,† F. Lo Sterzo,151,† E. Lobodzinska,42,† P. Loch,7,† W. S. Lockman,137,†
F. K. Loebinger,84,† A. E. Loevschall-Jensen,36,† A. Loginov,176,† T. Lohse,16,† K. Lohwasser,42,† M. Lokajicek,127,†
B. A. Long,22,† J. D. Long,89,† R. E. Long,72,† K. A. Looper,111,† L. Lopes,126a,† D. Lopez Mateos,57,† B. Lopez Paredes,139,†
I. Lopez Paz,12,† J. Lorenz,100,† N. Lorenzo Martinez,61,† M. Losada,162,† P. Loscutoff,15,† P. J. Lösel,100,† X. Lou,33a,†
A. Lounis,117,† J. Love,6,† P. A. Love,72,† N. Lu,89,† H. J. Lubatti,138,† C. Luci,132a,132b,† A. Lucotte,55,† F. Luehring,61,†
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-13
W. Lukas,62,† L. Luminari,132a,† O. Lundberg,146a,146b,† B. Lund-Jensen,147,† D. Lynn,25,† R. Lysak,127,† E. Lytken,81,†
H. Ma,25,† L. L. Ma,33d,† G. Maccarrone,47,† A. Macchiolo,101,† C.M. Macdonald,139,† J. Machado Miguens,122,126b,†
D. Macina,30,† D. Madaffari,85,† R. Madar,34,† H. J. Maddocks,72,† W. F. Mader,44,† A. Madsen,166,† S. Maeland,14,†
T. Maeno,25,† A. Maevskiy,99,† E. Magradze,54,† K. Mahboubi,48,† J. Mahlstedt,107,† C. Maiani,136,† C. Maidantchik,24a,†
A. A. Maier,101,† T. Maier,100,† A. Maio,126a,126b,126d,† S. Majewski,116,† Y. Makida,66,† N. Makovec,117,† B. Malaescu,80,†
Pa. Malecki,39,† V. P. Maleev,123,† F. Malek,55,† U. Mallik,63,† D. Malon,6,† C. Malone,143,† S. Maltezos,10,†
V.M. Malyshev,109,† S. Malyukov,30,† J. Mamuzic,42,† G. Mancini,47,† B. Mandelli,30,† L. Mandelli,91a,† I. Mandić,75,†
R. Mandrysch,63,† J. Maneira,126a,126b,† A. Manfredini,101,† L. Manhaes de Andrade Filho,24b,† J. Manjarres Ramos,159b,†
A. Mann,100,† P.M. Manning,137,† A. Manousakis-Katsikakis,9,† B. Mansoulie,136,† R. Mantifel,87,† M. Mantoani,54,†
L. Mapelli,30,† L. March,145c,†G. Marchiori,80,†M.Marcisovsky,127,† C. P. Marino,169,†M.Marjanovic,13,† F. Marroquim,24a,†
S. P. Marsden,84,† Z. Marshall,15,† L. F. Marti,17,† S. Marti-Garcia,167,† B. Martin,90,† T. A. Martin,170,† V. J. Martin,46,†
B. Martin dit Latour,14,† M. Martinez,12,p,† S. Martin-Haugh,131,† V. S. Martoiu,26a,† A. C. Martyniuk,78,† M. Marx,138,†
F. Marzano,132a,† A. Marzin,30,† L. Masetti,83,† T. Mashimo,155,† R. Mashinistov,96,† J. Masik,84,† A. L. Maslennikov,109,d,†
I. Massa,20a,20b,† L. Massa,20a,20b,† N. Massol,5,† P. Mastrandrea,148,† A. Mastroberardino,37a,37b,† T. Masubuchi,155,†
P. Mättig,175,† J. Mattmann,83,† J. Maurer,26a,† S. J. Maxfield,74,† D. A. Maximov,109,d,† R. Mazini,151,† S. M. Mazza,91a,91b,†
L. Mazzaferro,133a,133b,† G. Mc Goldrick,158,† S. P. Mc Kee,89,† A. McCarn,89,† R. L. McCarthy,148,† T. G. McCarthy,29,†
N. A. McCubbin,131,† K.W. McFarlane,56,a,† J. A. Mcfayden,78,† G. Mchedlidze,54,† S. J. McMahon,131,†
R. A. McPherson,169,l,† M. Medinnis,42,† S. Meehan,145a,† S. Mehlhase,100,† A. Mehta,74,† K. Meier,58a,† C. Meineck,100,†
B. Meirose,41,† B. R. Mellado Garcia,145c,† F. Meloni,17,† A. Mengarelli,20a,20b,† S. Menke,101,† E. Meoni,161,†
K.M. Mercurio,57,† S. Mergelmeyer,21,† P. Mermod,49,† L. Merola,104a,104b,† C. Meroni,91a,† F. S. Merritt,31,†
A. Messina,132a,132b,† J. Metcalfe,25,† A. S. Mete,163,† C. Meyer,83,† C. Meyer,122,† J-P. Meyer,136,† J. Meyer,107,†
R. P. Middleton,131,† S. Miglioranzi,164a,164c,† L. Mijović,21,† G. Mikenberg,172,† M. Mikestikova,127,† M. Mikuž,75,†
M. Milesi,88,† A. Milic,30,† D.W. Miller,31,† C. Mills,46,† A. Milov,172,† D. A. Milstead,146a,146b,† A. A. Minaenko,130,†
Y. Minami,155,† I. A. Minashvili,65,† A. I. Mincer,110,† B. Mindur,38a,† M. Mineev,65,† Y. Ming,173,† L.M. Mir,12,†
T. Mitani,171,† J. Mitrevski,100,† V. A. Mitsou,167,† A. Miucci,49,† P. S. Miyagawa,139,† J. U. Mjörnmark,81,† T. Moa,146a,146b,†
K. Mochizuki,85,† S. Mohapatra,35,† W. Mohr,48,† S. Molander,146a,146b,† R. Moles-Valls,167,† K. Mönig,42,† C. Monini,55,†
J. Monk,36,† E. Monnier,85,† J. Montejo Berlingen,12,† F. Monticelli,71,† S. Monzani,132a,132b,† R.W. Moore,3,†
N. Morange,117,† D. Moreno,162,† M. Moreno Llácer,54,† P. Morettini,50a,† M. Morgenstern,44,† M. Morii,57,†
M. Morinaga,155,† V. Morisbak,119,† S. Moritz,83,† A. K. Morley,147,† G. Mornacchi,30,† J. D. Morris,76,† S. S. Mortensen,36,†
A. Morton,53,† L. Morvaj,103,† M. Mosidze,51b,† J. Moss,111,† K. Motohashi,157,† R. Mount,143,† E. Mountricha,25,†
S. V. Mouraviev,96,a,† E. J. W. Moyse,86,† S. Muanza,85,† R. D. Mudd,18,† F. Mueller,101,† J. Mueller,125,† K. Mueller,21,†
R. S. P. Mueller,100,† T. Mueller,28,† D. Muenstermann,49,† P. Mullen,53,† Y. Munwes,153,† J. A. Murillo Quijada,18,†
W. J. Murray,170,131,† H. Musheghyan,54,† E. Musto,152,† A. G. Myagkov,130,bb,† M. Myska,128,† O. Nackenhorst,54,†
J. Nadal,54,† K. Nagai,120,† R. Nagai,157,† Y. Nagai,85,† K. Nagano,66,† A. Nagarkar,111,† Y. Nagasaka,59,† K. Nagata,160,†
M. Nagel,101,† E. Nagy,85,† A.M. Nairz,30,† Y. Nakahama,30,† K. Nakamura,66,† T. Nakamura,155,† I. Nakano,112,†
H. Namasivayam,41,† R. F. Naranjo Garcia,42,† R. Narayan,31,† T. Naumann,42,† G. Navarro,162,† R. Nayyar,7,† H. A. Neal,89,†
P.Yu. Nechaeva,96,† T. J. Neep,84,† P. D. Nef,143,† A. Negri,121a,121b,† M. Negrini,20a,† S. Nektarijevic,106,† C. Nellist,117,†
A. Nelson,163,† S. Nemecek,127,† P. Nemethy,110,† A. A. Nepomuceno,24a,† M. Nessi,30,cc,† M. S. Neubauer,165,†
M. Neumann,175,† R.M. Neves,110,† P. Nevski,25,† P. R. Newman,18,† D. H. Nguyen,6,† R. B. Nickerson,120,†
R. Nicolaidou,136,† B. Nicquevert,30,† J. Nielsen,137,† N. Nikiforou,35,† A. Nikiforov,16,† V. Nikolaenko,130,bb,†
I. Nikolic-Audit,80,† K. Nikolopoulos,18,† J. K. Nilsen,119,† P. Nilsson,25,† Y. Ninomiya,155,† A. Nisati,132a,† R. Nisius,101,†
T. Nobe,157,† M. Nomachi,118,† I. Nomidis,29,† T. Nooney,76,† S. Norberg,113,† M. Nordberg,30,† O. Novgorodova,44,†
S. Nowak,101,† M. Nozaki,66,† L. Nozka,115,† K. Ntekas,10,† G. Nunes Hanninger,88,† T. Nunnemann,100,† E. Nurse,78,†
F. Nuti,88,† B. J. O’Brien,46,† F. O’grady,7,† D. C. O’Neil,142,† V. O’Shea,53,† F. G. Oakham,29,e,† H. Oberlack,101,†
T. Obermann,21,† J. Ocariz,80,† A. Ochi,67,† I. Ochoa,78,† J. P. Ochoa-Ricoux,32a,† S. Oda,70,† S. Odaka,66,† H. Ogren,61,†
A. Oh,84,† S. H. Oh,45,† C. C. Ohm,15,† H. Ohman,166,† H. Oide,30,† W. Okamura,118,† H. Okawa,160,† Y. Okumura,31,†
T. Okuyama,155,† A. Olariu,26a,† S. A. Olivares Pino,46,† D. Oliveira Damazio,25,† E. Oliver Garcia,167,† A. Olszewski,39,†
J. Olszowska,39,† A. Onofre,126a,126e,† P. U. E. Onyisi,31,r,† C. J. Oram,159a,† M. J. Oreglia,31,† Y. Oren,153,†
D. Orestano,134a,134b,† N. Orlando,154,† C. Oropeza Barrera,53,† R. S. Orr,158,† B. Osculati,50a,50b,† R. Ospanov,84,†
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-14
G. Otero y Garzon,27,† H. Otono,70,† M. Ouchrif,135d,† E. A. Ouellette,169,† F. Ould-Saada,119,† A. Ouraou,136,†
K. P. Oussoren,107,† Q. Ouyang,33a,† A. Ovcharova,15,† M. Owen,53,† R. E. Owen,18,† V. E. Ozcan,19a,† N. Ozturk,8,†
K. Pachal,142,† A. Pacheco Pages,12,† C. Padilla Aranda,12,† M. Pagáčová,48,† S. Pagan Griso,15,† E. Paganis,139,† C. Pahl,101,†
F. Paige,25,† P. Pais,86,† K. Pajchel,119,† G. Palacino,159b,† S. Palestini,30,† M. Palka,38b,† D. Pallin,34,† A. Palma,126a,126b,†
Y. B. Pan,173,† E. Panagiotopoulou,10,† C. E. Pandini,80,† J. G. Panduro Vazquez,77,† P. Pani,146a,146b,† S. Panitkin,25,†
D. Pantea,26a,† L. Paolozzi,49,† Th.D. Papadopoulou,10,† K. Papageorgiou,154,† A. Paramonov,6,† D. Paredes Hernandez,154,†
M. A. Parker,28,† K. A. Parker,139,† F. Parodi,50a,50b,† J. A. Parsons,35,† U. Parzefall,48,† E. Pasqualucci,132a,† S. Passaggio,50a,†
F. Pastore,134a,134b,a,† Fr. Pastore,77,† G. Pásztor,29,† S. Pataraia,175,† N. D. Patel,150,† J. R. Pater,84,† T. Pauly,30,† J. Pearce,169,†
B. Pearson,113,† L. E. Pedersen,36,† M. Pedersen,119,† S. Pedraza Lopez,167,† R. Pedro,126a,126b,† S. V. Peleganchuk,109,†
D. Pelikan,166,† H. Peng,33b,† B. Penning,31,† J. Penwell,61,† D. V. Perepelitsa,25,† E. Perez Codina,159a,†
M. T. Pérez García-Estañ,167,† L. Perini,91a,91b,† H. Pernegger,30,† S. Perrella,104a,104b,† R. Peschke,42,† V. D. Peshekhonov,65,†
K. Peters,30,† R. F. Y. Peters,84,† B. A. Petersen,30,† T. C. Petersen,36,† E. Petit,42,† A. Petridis,146a,146b,† C. Petridou,154,†
E. Petrolo,132a,† F. Petrucci,134a,134b,† N. E. Pettersson,157,† R. Pezoa,32b,† P.W. Phillips,131,† G. Piacquadio,143,† E. Pianori,170,†
A. Picazio,49,† E. Piccaro,76,† M. Piccinini,20a,20b,† M. A. Pickering,120,† R. Piegaia,27,† D. T. Pignotti,111,† J. E. Pilcher,31,†
A. D. Pilkington,84,† J. Pina,126a,126b,126d,† M. Pinamonti,164a,164c,dd,† J. L. Pinfold,3,† A. Pingel,36,† B. Pinto,126a,† S. Pires,80,†
M. Pitt,172,† C. Pizio,91a,91b,† L. Plazak,144a,† M.-A. Pleier,25,† V. Pleskot,129,† E. Plotnikova,65,† P. Plucinski,146a,146b,†
D. Pluth,64,† R. Poettgen,83,† L. Poggioli,117,† D. Pohl,21,† G. Polesello,121a,† A. Policicchio,37a,37b,† R. Polifka,158,†
A. Polini,20a,† C. S. Pollard,53,† V. Polychronakos,25,† K. Pommès,30,† L. Pontecorvo,132a,† B. G. Pope,90,†
G. A. Popeneciu,26b,† D. S. Popovic,13,† A. Poppleton,30,† S. Pospisil,128,† K. Potamianos,15,† I. N. Potrap,65,† C. J. Potter,149,†
C. T. Potter,116,† G. Poulard,30,† J. Poveda,30,† V. Pozdnyakov,65,† P. Pralavorio,85,† A. Pranko,15,† S. Prasad,30,† S. Prell,64,†
D. Price,84,† L. E. Price,6,† M. Primavera,73a,† S. Prince,87,† M. Proissl,46,† K. Prokofiev,60c,† F. Prokoshin,32b,†
E. Protopapadaki,136,† S. Protopopescu,25,† J. Proudfoot,6,† M. Przybycien,38a,† E. Ptacek,116,† D. Puddu,134a,134b,†
E. Pueschel,86,† D. Puldon,148,† M. Purohit,25,ee,† P. Puzo,117,† J. Qian,89,† G. Qin,53,† Y. Qin,84,† A. Quadt,54,†
D. R. Quarrie,15,† W. B. Quayle,164a,164b,† M. Queitsch-Maitland,84,† D. Quilty,53,† S. Raddum,119,† V. Radeka,25,†
V. Radescu,42,† S. K. Radhakrishnan,148,† P. Radloff,116,† P. Rados,88,† F. Ragusa,91a,91b,† G. Rahal,178,† S. Rajagopalan,25,†
M. Rammensee,30,† C. Rangel-Smith,166,† F. Rauscher,100,† S. Rave,83,† T. Ravenscroft,53,† M. Raymond,30,† A. L. Read,119,†
N. P. Readioff,74,† D.M. Rebuzzi,121a,121b,† A. Redelbach,174,† G. Redlinger,25,† R. Reece,137,† K. Reeves,41,† L. Rehnisch,16,†
H. Reisin,27,† M. Relich,163,† C. Rembser,30,† H. Ren,33a,† A. Renaud,117,† M. Rescigno,132a,† S. Resconi,91a,†
O. L. Rezanova,109,d,† P. Reznicek,129,† R. Rezvani,95,† R. Richter,101,† S. Richter,78,† E. Richter-Was,38b,† O. Ricken,21,†
M. Ridel,80,† P. Rieck,16,† C. J. Riegel,175,† J. Rieger,54,† M. Rijssenbeek,148,† A. Rimoldi,121a,121b,† L. Rinaldi,20a,†
B. Ristić,49,† E. Ritsch,62,† I. Riu,12,† F. Rizatdinova,114,† E. Rizvi,76,† S. H. Robertson,87,l,† A. Robichaud-Veronneau,87,†
D. Robinson,28,† J. E. M. Robinson,84,† A. Robson,53,† C. Roda,124a,124b,† S. Roe,30,† O. Røhne,119,† S. Rolli,161,†
A. Romaniouk,98,† M. Romano,20a,20b,† S.M. Romano Saez,34,† E. Romero Adam,167,† N. Rompotis,138,† M. Ronzani,48,†
L. Roos,80,† E. Ros,167,† S. Rosati,132a,† K. Rosbach,48,† P. Rose,137,† P. L. Rosendahl,14,† O. Rosenthal,141,†
V. Rossetti,146a,146b,† E. Rossi,104a,104b,† L. P. Rossi,50a,† R. Rosten,138,† M. Rotaru,26a,† I. Roth,172,† J. Rothberg,138,†
D. Rousseau,117,† C. R. Royon,136,† A. Rozanov,85,† Y. Rozen,152,† X. Ruan,145c,† F. Rubbo,143,† I. Rubinskiy,42,† V. I. Rud,99,†
C. Rudolph,44,†M. S. Rudolph,158,† F. Rühr,48,†A. Ruiz-Martinez,30,† Z. Rurikova,48,†N. A. Rusakovich,65,†A. Ruschke,100,†
H. L. Russell,138,† J. P. Rutherfoord,7,† N. Ruthmann,48,† Y. F. Ryabov,123,† M. Rybar,129,† G. Rybkin,117,† N. C. Ryder,120,†
A. F. Saavedra,150,† G. Sabato,107,† S. Sacerdoti,27,† A. Saddique,3,† H. F-W. Sadrozinski,137,† R. Sadykov,65,†
F. Safai Tehrani,132a,† M. Saimpert,136,† H. Sakamoto,155,† Y. Sakurai,171,† G. Salamanna,134a,134b,† A. Salamon,133a,†
M. Saleem,113,† D. Salek,107,† P. H. Sales De Bruin,138,† D. Salihagic,101,† A. Salnikov,143,† J. Salt,167,† D. Salvatore,37a,37b,†
F. Salvatore,149,† A. Salvucci,106,† A. Salzburger,30,† D. Sampsonidis,154,† A. Sanchez,104a,104b,† J. Sánchez,167,†
V. Sanchez Martinez,167,† H. Sandaker,14,† R. L. Sandbach,76,† H. G. Sander,83,† M. P. Sanders,100,† M. Sandhoff,175,†
C. Sandoval,162,† R. Sandstroem,101,† D. P. C. Sankey,131,† M. Sannino,50a,50b,† A. Sansoni,47,† C. Santoni,34,†
R. Santonico,133a,133b,† H. Santos,126a,† I. Santoyo Castillo,149,† K. Sapp,125,† A. Sapronov,65,† J. G. Saraiva,126a,126d,†
B. Sarrazin,21,† O. Sasaki,66,† Y. Sasaki,155,† K. Sato,160,† G. Sauvage,5,a,† E. Sauvan,5,† G. Savage,77,† P. Savard,158,e,†
C. Sawyer,120,† L. Sawyer,79,o,† J. Saxon,31,† C. Sbarra,20a,† A. Sbrizzi,20a,20b,† T. Scanlon,78,† D. A. Scannicchio,163,†
M. Scarcella,150,† V. Scarfone,37a,37b,† J. Schaarschmidt,172,† P. Schacht,101,† D. Schaefer,30,† R. Schaefer,42,† J. Schaeffer,83,†
S. Schaepe,21,† S. Schaetzel,58b,† U. Schäfer,83,† A. C. Schaffer,117,† D. Schaile,100,† R. D. Schamberger,148,† V. Scharf,58a,†
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-15
V. A. Schegelsky,123,† D. Scheirich,129,† M. Schernau,163,† C. Schiavi,50a,50b,† C. Schillo,48,† M. Schioppa,37a,37b,†
S. Schlenker,30,† E. Schmidt,48,† K. Schmieden,30,† C. Schmitt,83,† S. Schmitt,58b,† S. Schmitt,42,† B. Schneider,159a,†
Y. J. Schnellbach,74,† U. Schnoor,44,† L. Schoeffel,136,† A. Schoening,58b,† B. D. Schoenrock,90,† E. Schopf,21,†
A. L. S. Schorlemmer,54,† M. Schott,83,† D. Schouten,159a,† J. Schovancova,8,† S. Schramm,158,† M. Schreyer,174,†
C. Schroeder,83,† N. Schuh,83,† M. J. Schultens,21,† H.-C. Schultz-Coulon,58a,† H. Schulz,16,† M. Schumacher,48,†
B. A. Schumm,137,† Ph. Schune,136,† C. Schwanenberger,84,† A. Schwartzman,143,† T. A. Schwarz,89,† Ph. Schwegler,101,†
Ph. Schwemling,136,† R. Schwienhorst,90,† J. Schwindling,136,† T. Schwindt,21,† M. Schwoerer,5,† F. G. Sciacca,17,†
E. Scifo,117,† G. Sciolla,23,† F. Scuri,124a,124b,† F. Scutti,21,† J. Searcy,89,† G. Sedov,42,† E. Sedykh,123,† P. Seema,21,†
S. C. Seidel,105,† A. Seiden,137,† F. Seifert,128,† J. M. Seixas,24a,† G. Sekhniaidze,104a,† K. Sekhon,89,† S. J. Sekula,40,†
K. E. Selbach,46,† D.M. Seliverstov,123,a,† N. Semprini-Cesari,20a,20b,† C. Serfon,30,† L. Serin,117,† L. Serkin,164a,164b,†
T. Serre,85,† M. Sessa,134a,134b,† R. Seuster,159a,† H. Severini,113,† T. Sfiligoj,75,† F. Sforza,101,† A. Sfyrla,30,† E. Shabalina,54,†
M. Shamim,116,† L. Y. Shan,33a,† R. Shang,165,† J. T. Shank,22,† M. Shapiro,15,† P. B. Shatalov,97,† K. Shaw,164a,164b,†
S. M. Shaw,84,†A. Shcherbakova,146a,146b,† C. Y. Shehu,149,† P. Sherwood,78,† L. Shi,151,ff,† S. Shimizu,67,† C. O. Shimmin,163,†
M. Shimojima,102,† M. Shiyakova,65,† A. Shmeleva,96,† D. Shoaleh Saadi,95,† M. J. Shochet,31,† S. Shojaii,91a,91b,†
S. Shrestha,111,† E. Shulga,98,† M. A. Shupe,7,† S. Shushkevich,42,† P. Sicho,127,† O. Sidiropoulou,174,† D. Sidorov,114,†
A. Sidoti,20a,20b,† F. Siegert,44,† Dj. Sijacki,13,† J. Silva,126a,126d,† Y. Silver,153,† S. B. Silverstein,146a,† V. Simak,128,†
O. Simard,5,† Lj. Simic,13,† S. Simion,117,† E. Simioni,83,† B. Simmons,78,†D. Simon,34,† R. Simoniello,91a,91b,† P. Sinervo,158,†
N. B. Sinev,116,† G. Siragusa,174,† A. N. Sisakyan,65,a,† S.Yu. Sivoklokov,99,† J. Sjölin,146a,146b,† T. B. Sjursen,14,†
M. B. Skinner,72,† H. P. Skottowe,57,† P. Skubic,113,† M. Slater,18,† T. Slavicek,128,† M. Slawinska,107,† K. Sliwa,161,†
V. Smakhtin,172,† B. H. Smart,46,† L. Smestad,14,† S.Yu. Smirnov,98,† Y. Smirnov,98,† L. N. Smirnova,99,gg,† O. Smirnova,81,†
M. N. K. Smith,35,† R.W. Smith,35,† M. Smizanska,72,† K. Smolek,128,† A. A. Snesarev,96,† G. Snidero,76,† S. Snyder,25,†
R. Sobie,169,l,† F. Socher,44,† A. Soffer,153,† D. A. Soh,151,ff,† C. A. Solans,30,† M. Solar,128,† J. Solc,128,† E.Yu. Soldatov,98,†
U. Soldevila,167,† A. A. Solodkov,130,† A. Soloshenko,65,† O. V. Solovyanov,130,† V. Solovyev,123,† P. Sommer,48,†
H. Y. Song,33b,† N. Soni,1,† A. Sood,15,† A. Sopczak,128,† B. Sopko,128,† V. Sopko,128,† V. Sorin,12,† D. Sosa,58b,†
M. Sosebee,8,† C. L. Sotiropoulou,124a,124b,† R. Soualah,164a,164c,† P. Soueid,95,† A.M. Soukharev,109,d,† D. South,42,†
B. C. Sowden,77,† S. Spagnolo,73a,73b,† M. Spalla,124a,124b,† F. Spanò,77,† W. R. Spearman,57,† F. Spettel,101,† R. Spighi,20a,†
G. Spigo,30,† L. A. Spiller,88,† M. Spousta,129,† T. Spreitzer,158,† R. D. St. Denis,53,a,† S. Staerz,44,† J. Stahlman,122,†
R. Stamen,58a,† S. Stamm,16,† E. Stanecka,39,† C. Stanescu,134a,† M. Stanescu-Bellu,42,† M.M. Stanitzki,42,† S. Stapnes,119,†
E. A. Starchenko,130,† J. Stark,55,† P. Staroba,127,† P. Starovoitov,42,† R. Staszewski,39,† P. Stavina,144a,a,† P. Steinberg,25,†
B. Stelzer,142,† H. J. Stelzer,30,† O. Stelzer-Chilton,159a,† H. Stenzel,52,† S. Stern,101,† G. A. Stewart,53,† J. A. Stillings,21,†
M. C. Stockton,87,† M. Stoebe,87,† G. Stoicea,26a,† P. Stolte,54,† S. Stonjek,101,† A. R. Stradling,8,† A. Straessner,44,†
M. E. Stramaglia,17,† J. Strandberg,147,† S. Strandberg,146a,146b,† A. Strandlie,119,† E. Strauss,143,† M. Strauss,113,†
P. Strizenec,144b,† R. Ströhmer,174,† D.M. Strom,116,† R. Stroynowski,40,† A. Strubig,106,† S. A. Stucci,17,† B. Stugu,14,†
N. A. Styles,42,† D. Su,143,† J. Su,125,† R. Subramaniam,79,† A. Succurro,12,† Y. Sugaya,118,† C. Suhr,108,† M. Suk,128,†
V. V. Sulin,96,† S. Sultansoy,4c,† T. Sumida,68,† S. Sun,57,† X. Sun,33a,† J. E. Sundermann,48,† K. Suruliz,149,†
G. Susinno,37a,37b,† M. R. Sutton,149,† S. Suzuki,66,† Y. Suzuki,66,† M. Svatos,127,† S. Swedish,168,† M. Swiatlowski,143,†
I. Sykora,144a,† T. Sykora,129,† D. Ta,90,† C. Taccini,134a,134b,† K. Tackmann,42,† J. Taenzer,158,† A. Taffard,163,† R. Tafirout,159a,†
N. Taiblum,153,† H. Takai,25,† R. Takashima,69,† H. Takeda,67,† T. Takeshita,140,† Y. Takubo,66,† M. Talby,85,†
A. A. Talyshev,109,d,† J. Y. C. Tam,174,† K. G. Tan,88,† J. Tanaka,155,† R. Tanaka,117,† S. Tanaka,66,† B. B. Tannenwald,111,†
N. Tannoury,21,† S. Tapprogge,83,† S. Tarem,152,† F. Tarrade,29,† G. F. Tartarelli,91a,† P. Tas,129,† M. Tasevsky,127,†
T. Tashiro,68,† E. Tassi,37a,37b,†A. Tavares Delgado,126a,126b,†Y. Tayalati,135d,† F. E. Taylor,94,†G. N. Taylor,88,†W. Taylor,159b,†
F. A. Teischinger,30,† M. Teixeira Dias Castanheira,76,† P. Teixeira-Dias,77,† K. K. Temming,48,† H. Ten Kate,30,†
P. K. Teng,151,† J. J. Teoh,118,† F. Tepel,175,† S. Terada,66,† K. Terashi,155,† J. Terron,82,† S. Terzo,101,† M. Testa,47,†
R. J. Teuscher,158,l,† J. Therhaag,21,† T. Theveneaux-Pelzer,34,† J. P. Thomas,18,† J. Thomas-Wilsker,77,† E. N. Thompson,35,†
P. D. Thompson,18,† R. J. Thompson,84,† A. S. Thompson,53,† L. A. Thomsen,36,† E. Thomson,122,† M. Thomson,28,†
R. P. Thun,89,a,† M. J. Tibbetts,15,† R. E. Ticse Torres,85,† V. O. Tikhomirov,96,hh,† Yu.A. Tikhonov,109,d,† S. Timoshenko,98,†
E. Tiouchichine,85,† P. Tipton,176,† S. Tisserant,85,† T. Todorov,5,a,† S. Todorova-Nova,129,† J. Tojo,70,† S. Tokár,144a,†
K. Tokushuku,66,† K. Tollefson,90,† E. Tolley,57,† L. Tomlinson,84,† M. Tomoto,103,† L. Tompkins,143,ii,† K. Toms,105,†
E. Torrence,116,† H. Torres,142,† E. Torró Pastor,167,† J. Toth,85,jj,† F. Touchard,85,† D. R. Tovey,139,† T. Trefzger,174,†
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-16
L. Tremblet,30,† A. Tricoli,30,† I. M. Trigger,159a,† S. Trincaz-Duvoid,80,† M. F. Tripiana,12,† W. Trischuk,158,† B. Trocmé,55,†
C. Troncon,91a,† M. Trottier-McDonald,15,† M. Trovatelli,134a,134b,† P. True,90,† L. Truong,164a,164c,† M. Trzebinski,39,†
A. Trzupek,39,† C. Tsarouchas,30,† J.C-L. Tseng,120,† P. V. Tsiareshka,92,† D. Tsionou,154,† G. Tsipolitis,10,† N. Tsirintanis,9,†
S. Tsiskaridze,12,† V. Tsiskaridze,48,† E. G. Tskhadadze,51a,† I. I. Tsukerman,97,† V. Tsulaia,15,† S. Tsuno,66,†
D. Tsybychev,148,† A. Tudorache,26a,† V. Tudorache,26a,† A. N. Tuna,122,† S. A. Tupputi,20a,20b,† S. Turchikhin,99,gg,†
D. Turecek,128,† R. Turra,91a,91b,† A. J. Turvey,40,† P. M. Tuts,35,† A. Tykhonov,49,† M. Tylmad,146a,146b,† M. Tyndel,131,†
I. Ueda,155,† R. Ueno,29,† M. Ughetto,146a,146b,† M. Ugland,14,† M. Uhlenbrock,21,† F. Ukegawa,160,† G. Unal,30,†
A. Undrus,25,† G. Unel,163,† F. C. Ungaro,48,† Y. Unno,66,† C. Unverdorben,100,† J. Urban,144b,† P. Urquijo,88,† P. Urrejola,83,†
G. Usai,8,† A. Usanova,62,† L. Vacavant,85,† V. Vacek,128,† B. Vachon,87,† C. Valderanis,83,† N. Valencic,107,†
S. Valentinetti,20a,20b,† A. Valero,167,† L. Valery,12,† S. Valkar,129,† E. Valladolid Gallego,167,† S. Vallecorsa,49,†
J. A. Valls Ferrer,167,† W. Van Den Wollenberg,107,† P. C. Van Der Deijl,107,† R. van der Geer,107,† H. van der Graaf,107,†
R. Van Der Leeuw,107,† N. van Eldik,152,† P. van Gemmeren,6,† J. Van Nieuwkoop,142,† I. van Vulpen,107,†
M. C. van Woerden,30,† M. Vanadia,132a,132b,† W. Vandelli,30,† R. Vanguri,122,† A. Vaniachine,6,† F. Vannucci,80,†
G. Vardanyan,177,† R. Vari,132a,† E.W. Varnes,7,† T. Varol,40,† D. Varouchas,80,† A. Vartapetian,8,† K. E. Varvell,150,†
F. Vazeille,34,† T. Vazquez Schroeder,87,† J. Veatch,7,† L. M. Veloce,158,† F. Veloso,126a,126c,† T. Velz,21,† S. Veneziano,132a,†
A. Ventura,73a,73b,† D. Ventura,86,† M. Venturi,169,† N. Venturi,158,† A. Venturini,23,† V. Vercesi,121a,† M. Verducci,132a,132b,†
W. Verkerke,107,† J. C. Vermeulen,107,† A. Vest,44,† M. C. Vetterli,142,e,† O. Viazlo,81,† I. Vichou,165,† T. Vickey,139,†
O. E. Vickey Boeriu,139,† G. H. A. Viehhauser,120,† S. Viel,15,† R. Vigne,30,† M. Villa,20a,20b,† M. Villaplana Perez,91a,91b,†
E. Vilucchi,47,† M. G. Vincter,29,† V. B. Vinogradov,65,† I. Vivarelli,149,† F. Vives Vaque,3,† S. Vlachos,10,† D. Vladoiu,100,†
M. Vlasak,128,† M. Vogel,32a,† P. Vokac,128,† G. Volpi,124a,124b,† M. Volpi,88,† H. von der Schmitt,101,† H. von Radziewski,48,†
E. von Toerne,21,† V. Vorobel,129,† K. Vorobev,98,† M. Vos,167,† R. Voss,30,† J. H. Vossebeld,74,† N. Vranjes,13,†
M. Vranjes Milosavljevic,13,† V. Vrba,127,† M. Vreeswijk,107,† R. Vuillermet,30,† I. Vukotic,31,† Z. Vykydal,128,† P. Wagner,21,†
W. Wagner,175,† H. Wahlberg,71,† S. Wahrmund,44,† J. Wakabayashi,103,† J. Walder,72,† R. Walker,100,† W. Walkowiak,141,†
C. Wang,33c,† F. Wang,173,† H. Wang,15,† H. Wang,40,† J. Wang,42,† J. Wang,33a,† K. Wang,87,† R. Wang,6,† S.M. Wang,151,†
T. Wang,21,† X. Wang,176,† C. Wanotayaroj,116,† A. Warburton,87,† C. P. Ward,28,† D. R. Wardrope,78,† M. Warsinsky,48,†
A. Washbrook,46,† C. Wasicki,42,† P. M. Watkins,18,† A. T. Watson,18,† I. J. Watson,150,† M. F. Watson,18,† G. Watts,138,†
S. Watts,84,† B.M. Waugh,78,† S. Webb,84,† M. S. Weber,17,† S.W. Weber,174,† J. S. Webster,31,† A. R. Weidberg,120,†
B. Weinert,61,† J. Weingarten,54,† C. Weiser,48,† H. Weits,107,† P. S. Wells,30,† T. Wenaus,25,† T. Wengler,30,† S. Wenig,30,†
N. Wermes,21,† M. Werner,48,† P. Werner,30,† M. Wessels,58a,† J. Wetter,161,† K. Whalen,29,† A.M. Wharton,72,† A. White,8,†
M. J. White,1,† R. White,32b,† S. White,124a,124b,† D. Whiteson,163,† F. J. Wickens,131,† W. Wiedenmann,173,† M. Wielers,131,†
P. Wienemann,21,† C. Wiglesworth,36,† L. A.M. Wiik-Fuchs,21,† A. Wildauer,101,† H. G. Wilkens,30,† H. H. Williams,122,†
S. Williams,107,† C. Willis,90,† S. Willocq,86,† A. Wilson,89,† J. A. Wilson,18,† I. Wingerter-Seez,5,† F. Winklmeier,116,†
B. T. Winter,21,† M. Wittgen,143,† J. Wittkowski,100,† S. J. Wollstadt,83,† M.W. Wolter,39,† H. Wolters,126a,126c,†
B. K. Wosiek,39,† J. Wotschack,30,† M. J. Woudstra,84,† K.W. Wozniak,39,† M. Wu,55,† M. Wu,31,† S. L. Wu,173,† X. Wu,49,†
Y. Wu,89,† T. R. Wyatt,84,† B.M. Wynne,46,† S. Xella,36,† D. Xu,33a,† L. Xu,33b,kk,† B. Yabsley,150,† S. Yacoob,145b,ll,†
R. Yakabe,67,† M. Yamada,66,† Y. Yamaguchi,118,† A. Yamamoto,66,† S. Yamamoto,155,† T. Yamanaka,155,† K. Yamauchi,103,†
Y. Yamazaki,67,† Z. Yan,22,† H. Yang,33e,† H. Yang,173,† Y. Yang,151,† L. Yao,33a,† W-M. Yao,15,† Y. Yasu,66,† E. Yatsenko,5,†
K. H. Yau Wong,21,† J. Ye,40,† S. Ye,25,† I. Yeletskikh,65,† A. L. Yen,57,† E. Yildirim,42,† K. Yorita,171,† R. Yoshida,6,†
K. Yoshihara,122,† C. Young,143,† C. J. S. Young,30,† S. Youssef,22,† D. R. Yu,15,† J. Yu,8,† J. M. Yu,89,† J. Yu,114,† L. Yuan,67,†
A. Yurkewicz,108,† I. Yusuff,28,mm,† B. Zabinski,39,† R. Zaidan,63,† A.M. Zaitsev,130,bb,† J. Zalieckas,14,† A. Zaman,148,†
S. Zambito,57,† L. Zanello,132a,132b,† D. Zanzi,88,† C. Zeitnitz,175,† M. Zeman,128,† A. Zemla,38a,† K. Zengel,23,† O. Zenin,130,†
T. Ženiš,144a,† D. Zerwas,117,† D. Zhang,89,† F. Zhang,173,† J. Zhang,6,† L. Zhang,48,† R. Zhang,33b,† X. Zhang,33d,†
Z. Zhang,117,† X. Zhao,40,† Y. Zhao,33d,117,† Z. Zhao,33b,† A. Zhemchugov,65,† J. Zhong,120,† B. Zhou,89,† C. Zhou,45,†
L. Zhou,35,† L. Zhou,40,† N. Zhou,163,† C. G. Zhu,33d,† H. Zhu,33a,† J. Zhu,89,† Y. Zhu,33b,† X. Zhuang,33a,† K. Zhukov,96,†
A. Zibell,174,† D. Zieminska,61,† N. I. Zimine,65,† C. Zimmermann,83,† S. Zimmermann,48,† Z. Zinonos,54,† M. Zinser,83,†
M. Ziolkowski,141,† L. Živković,13,† G. Zobernig,173,† A. Zoccoli,20a,20b,† M. zur Nedden,16,† G. Zurzolo,104a,104b,†
L. Zwalinski,30,† V. Khachatryan,179,‡ A.M. Sirunyan,179,‡ A. Tumasyan,179,‡ W. Adam,180,‡ E. Asilar,180,‡ T. Bergauer,180,‡
J. Brandstetter,180,‡ E. Brondolin,180,‡ M. Dragicevic,180,‡ J. Erö,180,‡ M. Flechl,180,‡ M. Friedl,180,‡ R. Frühwirth,180,nn,‡
V.M. Ghete,180,‡ C. Hartl,180,‡ N. Hörmann,180,‡ J. Hrubec,180,‡ M. Jeitler,180,nn,‡ V. Knünz,180,‡ A. König,180,‡
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-17
M. Krammer,180,nn,‡ I. Krätschmer,180,‡ D. Liko,180,‡ T. Matsushita,180,‡ I. Mikulec,180,‡ D. Rabady,180,oo,‡ B. Rahbaran,180,‡
H. Rohringer,180,‡ J. Schieck,180,nn,‡ R. Schöfbeck,180,‡ J. Strauss,180,‡ W. Treberer-Treberspurg,180,‡ W. Waltenberger,180,‡
C.-E. Wulz,180,nn,‡ V. Mossolov,181,‡ N. Shumeiko,181,‡ J. Suarez Gonzalez,181,‡ S. Alderweireldt,182,‡ T. Cornelis,182,‡
E. A. De Wolf,182,‡ X. Janssen,182,‡ A. Knutsson,182,‡ J. Lauwers,182,‡ S. Luyckx,182,‡ S. Ochesanu,182,‡ R. Rougny,182,‡
M. Van De Klundert,182,‡ H. Van Haevermaet,182,‡ P. Van Mechelen,182,‡ N. Van Remortel,182,‡ A. Van Spilbeeck,182,‡
S. Abu Zeid,183,‡ F. Blekman,183,‡ J. D’Hondt,183,‡ N. Daci,183,‡ I. De Bruyn,183,‡ K. Deroover,183,‡ N. Heracleous,183,‡
J. Keaveney,183,‡ S. Lowette,183,‡ L. Moreels,183,‡ A. Olbrechts,183,‡ Q. Python,183,‡ D. Strom,183,‡ S. Tavernier,183,‡
W. Van Doninck,183,‡ P. Van Mulders,183,‡ G. P. Van Onsem,183,‡ I. Van Parijs,183,‡ P. Barria,184,‡ C. Caillol,184,‡
B. Clerbaux,184,‡ G. De Lentdecker,184,‡ H. Delannoy,184,‡ D. Dobur,184,‡ G. Fasanella,184,‡ L. Favart,184,‡ A. P. R. Gay,184,‡
A. Grebenyuk,184,‡ T. Lenzi,184,‡ A. Léonard,184,‡ T. Maerschalk,184,‡ A. Mohammadi,184,‡ L. Perniè,184,‡
A. Randle-conde,184,‡ T. Reis,184,‡ T. Seva,184,‡ L. Thomas,184,‡ C. Vander Velde,184,‡ P. Vanlaer,184,‡ J. Wang,184,‡
R. Yonamine,184,‡ F. Zenoni,184,‡ F. Zhang,184,pp,‡ K. Beernaert,185,‡ L. Benucci,185,‡ A. Cimmino,185,‡ S. Crucy,185,‡
A. Fagot,185,‡ G. Garcia,185,‡ M. Gul,185,‡ J. Mccartin,185,‡ A. A. Ocampo Rios,185,‡ D. Poyraz,185,‡ D. Ryckbosch,185,‡
S. Salva Diblen,185,‡ M. Sigamani,185,‡ N. Strobbe,185,‡ M. Tytgat,185,‡ W. Van Driessche,185,‡ E. Yazgan,185,‡
N. Zaganidis,185,‡ S. Basegmez,186,‡ C. Beluffi,186,qq,‡ O. Bondu,186,‡ G. Bruno,186,‡ R. Castello,186,‡ A. Caudron,186,‡
L. Ceard,186,‡ G. G. Da Silveira,186,‡ C. Delaere,186,‡ D. Favart,186,‡ L. Forthomme,186,‡ A. Giammanco,186,rr,‡ J. Hollar,186,‡
A. Jafari,186,‡ P. Jez,186,‡ M. Komm,186,‡ V. Lemaitre,186,‡ A. Mertens,186,‡ C. Nuttens,186,‡ L. Perrini,186,‡ A. Pin,186,‡
K. Piotrzkowski,186,‡ A. Popov,186,ss,‡ L. Quertenmont,186,‡ M. Selvaggi,186,‡ M. Vidal Marono,186,‡ N. Beliy,187,‡
T. Caebergs,187,‡ G. H. Hammad,187,‡ W. L. Aldá Júnior,188,‡ G. A. Alves,188,‡ L. Brito,188,‡ M. Correa Martins Junior,188,‡
T. Dos Reis Martins,188,‡ C. Hensel,188,‡ C. Mora Herrera,188,‡ A. Moraes,188,‡ M. E. Pol,188,‡ P. Rebello Teles,188,‡
E. Belchior Batista Das Chagas,189,‡ W. Carvalho,189,‡ J. Chinellato,189,tt,‡ A. Custódio,189,‡ E. M. Da Costa,189,‡
D. De Jesus Damiao,189,‡ C. De Oliveira Martins,189,‡ S. Fonseca De Souza,189,‡ L.M. Huertas Guativa,189,‡
H. Malbouisson,189,‡ D. Matos Figueiredo,189,‡ L. Mundim,189,‡ H. Nogima,189,‡ W. L. Prado Da Silva,189,‡ A. Santoro,189,‡
A. Sznajder,189,‡ E. J. Tonelli Manganote,189,tt,‡ A. Vilela Pereira,189,‡ S. Ahuja,190a,‡ C. A. Bernardes,190b,‡
A. De Souza Santos,190b,‡ S. Dogra,190a,‡ T. R. Fernandez Perez Tomei,190a,‡ E. M. Gregores,190b,‡ P. G. Mercadante,190b,‡
C. S. Moon,190a,uu,‡ S. F. Novaes,190a,‡ Sandra S. Padula,190a,‡ D. Romero Abad,190a,‡ J. C. Ruiz Vargas,190a,‡
A. Aleksandrov,191,‡ V. Genchev,191,oo,‡ R. Hadjiiska,191,‡ P. Iaydjiev,191,‡ A. Marinov,191,‡ S. Piperov,191,‡ M. Rodozov,191,‡
S. Stoykova,191,‡ G. Sultanov,191,‡ M. Vutova,191,‡ A. Dimitrov,192,‡ I. Glushkov,192,‡ L. Litov,192,‡ B. Pavlov,192,‡
P. Petkov,192,‡ M. Ahmad,193,‡ J. G. Bian,193,‡ G.M. Chen,193,‡ H. S. Chen,193,‡ M. Chen,193,‡ T. Cheng,193,‡ R. Du,193,‡
C. H. Jiang,193,‡ R. Plestina,193,vv,‡ F. Romeo,193,‡ S.M. Shaheen,193,‡ J. Tao,193,‡ C. Wang,193,‡ Z. Wang,193,‡ H. Zhang,193,‡
C. Asawatangtrakuldee,194,‡ Y. Ban,194,‡ G. Chen,194,‡ Q. Li,194,‡ S. Liu,194,‡ Y. Mao,194,‡ S. J. Qian,194,‡ D. Wang,194,‡
M. Wang,194,‡ Q. Wang,194,‡ Z. Xu,194,‡ D. Yang,194,‡ Z. Zhang,194,‡ W. Zou,194,‡ C. Avila,195,‡ A. Cabrera,195,‡
L. F. Chaparro Sierra,195,‡ C. Florez,195,‡ J. P. Gomez,195,‡ B. Gomez Moreno,195,‡ J. C. Sanabria,195,‡ N. Godinovic,196,‡
D. Lelas,196,‡ D. Polic,196,‡ I. Puljak,196,‡ Z. Antunovic,197,‡ M. Kovac,197,‡ V. Brigljevic,198,‡ K. Kadija,198,‡ J. Luetic,198,‡
L. Sudic,198,‡ A. Attikis,199,‡ G. Mavromanolakis,199,‡ J. Mousa,199,‡ C. Nicolaou,199,‡ F. Ptochos,199,‡ P. A. Razis,199,‡
H. Rykaczewski,199,‡ M. Bodlak,200,‡ M. Finger,200,ww,‡ M. Finger Jr.,200,ww,‡ A. Ali,201,xx,yy,‡ R. Aly,201,zz,‡ S. Aly,201,zz,‡
Y. Assran,201,aaa,‡ A. Ellithi Kamel,201,bbb,‡ A. Lotfy,201,ccc,‡ M. A. Mahmoud,201,ccc,‡ R. Masod,201,xx,‡ A. Radi,201,yy,xx,‡
B. Calpas,202,‡ M. Kadastik,202,‡ M. Murumaa,202,‡ M. Raidal,202,‡ A. Tiko,202,‡ C. Veelken,202,‡ P. Eerola,203,‡
J. Pekkanen,203,‡ M. Voutilainen,203,‡ J. Härkönen,204,‡ V. Karimäki,204,‡ R. Kinnunen,204,‡ T. Lampén,204,‡
K. Lassila-Perini,204,‡ S. Lehti,204,‡ T. Lindén,204,‡ P. Luukka,204,‡ T. Mäenpää,204,‡ T. Peltola,204,‡ E. Tuominen,204,‡
J. Tuominiemi,204,‡ E. Tuovinen,204,‡ L. Wendland,204,‡ J. Talvitie,205,‡ T. Tuuva,205,‡ M. Besancon,206,‡ F. Couderc,206,‡
M. Dejardin,206,‡ D. Denegri,206,‡ B. Fabbro,206,‡ J. L. Faure,206,‡ C. Favaro,206,‡ F. Ferri,206,‡ S. Ganjour,206,‡
A. Givernaud,206,‡ P. Gras,206,‡ G. Hamel de Monchenault,206,‡ P. Jarry,206,‡ E. Locci,206,‡ M. Machet,206,‡ J. Malcles,206,‡
J. Rander,206,‡ A. Rosowsky,206,‡ M. Titov,206,‡ A. Zghiche,206,‡ S. Baffioni,207,‡ F. Beaudette,207,‡ P. Busson,207,‡
L. Cadamuro,207,‡ E. Chapon,207,‡ C. Charlot,207,‡ T. Dahms,207,‡ O. Davignon,207,‡ N. Filipovic,207,‡ A. Florent,207,‡
R. Granier de Cassagnac,207,‡ S. Lisniak,207,‡ L. Mastrolorenzo,207,‡ P. Miné,207,‡ I. N. Naranjo,207,‡ M. Nguyen,207,‡
C. Ochando,207,‡ G. Ortona,207,‡ P. Paganini,207,‡ S. Regnard,207,‡ R. Salerno,207,‡ J. B. Sauvan,207,‡ Y. Sirois,207,‡
T. Strebler,207,‡ Y. Yilmaz,207,‡ A. Zabi,207,‡ J.-L. Agram,208,ddd,‡ J. Andrea,208,‡ A. Aubin,208,‡ D. Bloch,208,‡ J.-M. Brom,208,‡
M. Buttignol,208,‡ E. C. Chabert,208,‡ N. Chanon,208,‡ C. Collard,208,‡ E. Conte,208,ddd,‡ J.-C. Fontaine,208,ddd,‡ D. Gelé,208,‡
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-18
U. Goerlach,208,‡ C. Goetzmann,208,‡ A.-C. Le Bihan,208,‡ J. A. Merlin,208,oo,‡ K. Skovpen,208,‡ P. Van Hove,208,‡
S. Gadrat,209,‡ S. Beauceron,210,‡ C. Bernet,210,‡G. Boudoul,210,‡ E. Bouvier,210,‡ S. Brochet,210,‡ C. A. Carrillo Montoya,210,‡
J. Chasserat,210,‡ R. Chierici,210,‡ D. Contardo,210,‡ B. Courbon,210,‡ P. Depasse,210,‡ H. El Mamouni,210,‡ J. Fan,210,‡
J. Fay,210,‡ S. Gascon,210,‡ M. Gouzevitch,210,‡ B. Ille,210,‡ I. B. Laktineh,210,‡ M. Lethuillier,210,‡ L. Mirabito,210,‡
A. L. Pequegnot,210,‡ S. Perries,210,‡ J. D. Ruiz Alvarez,210,‡ D. Sabes,210,‡ L. Sgandurra,210,‡ V. Sordini,210,‡
M. Vander Donckt,210,‡ P. Verdier,210,‡ S. Viret,210,‡ H. Xiao,210,‡ Z. Tsamalaidze,211,ww,‡ C. Autermann,212,‡ S. Beranek,212,‡
M. Bontenackels,212,‡ M. Edelhoff,212,‡ L. Feld,212,‡ A. Heister,212,‡ M. K. Kiesel,212,‡ K. Klein,212,‡ M. Lipinski,212,‡
A. Ostapchuk,212,‡ M. Preuten,212,‡ F. Raupach,212,‡ J. Sammet,212,‡ S. Schael,212,‡ J. F. Schulte,212,‡ T. Verlage,212,‡
H. Weber,212,‡ B. Wittmer,212,‡ V. Zhukov,212,ss,‡ M. Ata,213,‡ M. Brodski,213,‡ E. Dietz-Laursonn,213,‡ D. Duchardt,213,‡
M. Endres,213,‡ M. Erdmann,213,‡ S. Erdweg,213,‡ T. Esch,213,‡ R. Fischer,213,‡ A. Güth,213,‡ T. Hebbeker,213,‡
C. Heidemann,213,‡K. Hoepfner,213,‡D. Klingebiel,213,‡ S. Knutzen,213,‡ P. Kreuzer,213,‡M.Merschmeyer,213,‡A. Meyer,213,‡
P. Millet,213,‡ M. Olschewski,213,‡ K. Padeken,213,‡ P. Papacz,213,‡ T. Pook,213,‡ M. Radziej,213,‡ H. Reithler,213,‡
M. Rieger,213,‡ F. Scheuch,213,‡ L. Sonnenschein,213,‡ D. Teyssier,213,‡ S. Thüer,213,‡ V. Cherepanov,214,‡ Y. Erdogan,214,‡
G. Flügge,214,‡ H. Geenen,214,‡ M. Geisler,214,‡ W. Haj Ahmad,214,‡ F. Hoehle,214,‡ B. Kargoll,214,‡ T. Kress,214,‡
Y. Kuessel,214,‡ A. Künsken,214,‡ J. Lingemann,214,oo,‡ A. Nehrkorn,214,‡ A. Nowack,214,‡ I. M. Nugent,214,‡ C. Pistone,214,‡
O. Pooth,214,‡ A. Stahl,214,‡ M. Aldaya Martin,215,‡ I. Asin,215,‡ N. Bartosik,215,‡ O. Behnke,215,‡ U. Behrens,215,‡
A. J. Bell,215,‡ K. Borras,215,‡ A. Burgmeier,215,‡ A. Cakir,215,‡ L. Calligaris,215,‡ A. Campbell,215,‡ S. Choudhury,215,‡
F. Costanza,215,‡ C. Diez Pardos,215,‡ G. Dolinska,215,‡ S. Dooling,215,‡ T. Dorland,215,‡ G. Eckerlin,215,‡ D. Eckstein,215,‡
T. Eichhorn,215,‡ G. Flucke,215,‡ E. Gallo,215,‡ J. Garay Garcia,215,‡ A. Geiser,215,‡ A. Gizhko,215,‡ P. Gunnellini,215,‡
J. Hauk,215,‡ M. Hempel,215,eee,‡ H. Jung,215,‡ A. Kalogeropoulos,215,‡ O. Karacheban,215,eee,‡ M. Kasemann,215,‡
P. Katsas,215,‡ J. Kieseler,215,‡ C. Kleinwort,215,‡ I. Korol,215,‡ W. Lange,215,‡ J. Leonard,215,‡ K. Lipka,215,‡ A. Lobanov,215,‡
W. Lohmann,215,eee,‡ R. Mankel,215,‡ I. Marfin,215,eee,‡ I.-A. Melzer-Pellmann,215,‡ A. B. Meyer,215,‡ G. Mittag,215,‡
J. Mnich,215,‡ A. Mussgiller,215,‡ S. Naumann-Emme,215,‡ A. Nayak,215,‡ E. Ntomari,215,‡ H. Perrey,215,‡ D. Pitzl,215,‡
R. Placakyte,215,‡ A. Raspereza,215,‡ P. M. Ribeiro Cipriano,215,‡ B. Roland,215,‡ M. Ö. Sahin,215,‡ J. Salfeld-Nebgen,215,‡
P. Saxena,215,‡ T. Schoerner-Sadenius,215,‡ M. Schröder,215,‡ C. Seitz,215,‡ S. Spannagel,215,‡ K. D. Trippkewitz,215,‡
C. Wissing,215,‡ V. Blobel,216,‡ M. Centis Vignali,216,‡ A. R. Draeger,216,‡ J. Erfle,216,‡ E. Garutti,216,‡ K. Goebel,216,‡
D. Gonzalez,216,‡ M. Görner,216,‡ J. Haller,216,‡ M. Hoffmann,216,‡ R. S. Höing,216,‡ A. Junkes,216,‡ R. Klanner,216,‡
R. Kogler,216,‡ T. Lapsien,216,‡ T. Lenz,216,‡ I. Marchesini,216,‡ D. Marconi,216,‡ D. Nowatschin,216,‡ J. Ott,216,‡
F. Pantaleo,216,oo,‡ T. Peiffer,216,‡ A. Perieanu,216,‡ N. Pietsch,216,‡ J. Poehlsen,216,‡ D. Rathjens,216,‡ C. Sander,216,‡
H. Schettler,216,‡ P. Schleper,216,‡ E. Schlieckau,216,‡ A. Schmidt,216,‡ J. Schwandt,216,‡ M. Seidel,216,‡ V. Sola,216,‡
H. Stadie,216,‡ G. Steinbrück,216,‡ H. Tholen,216,‡ D. Troendle,216,‡ E. Usai,216,‡ L. Vanelderen,216,‡ A. Vanhoefer,216,‡
M. Akbiyik,217,‡ C. Amstutz,217,‡ C. Barth,217,‡ C. Baus,217,‡ J. Berger,217,‡ C. Beskidt,217,‡ C. Böser,217,‡ E. Butz,217,‡
R. Caspart,217,‡ T. Chwalek,217,‡ F. Colombo,217,‡ W. De Boer,217,‡ A. Descroix,217,‡ A. Dierlamm,217,‡ R. Eber,217,‡
M. Feindt,217,‡ S. Fink,217,‡ M. Fischer,217,‡ F. Frensch,217,‡ B. Freund,217,‡ R. Friese,217,‡ D. Funke,217,‡ M. Giffels,217,‡
A. Gilbert,217,‡ D. Haitz,217,‡ T. Harbaum,217,‡ M. A. Harrendorf,217,‡ F. Hartmann,217,oo,‡ U. Husemann,217,‡ F. Kassel,217,oo,‡
I. Katkov,217,ss,‡ A. Kornmayer,217,oo,‡ S. Kudella,217,‡ P. Lobelle Pardo,217,‡ B. Maier,217,‡ H. Mildner,217,‡ M. U. Mozer,217,‡
T. Müller,217,‡ Th. Müller,217,‡ M. Plagge,217,‡ M. Printz,217,‡ G. Quast,217,‡ K. Rabbertz,217,‡ S. Röcker,217,‡ F. Roscher,217,‡
I. Shvetsov,217,‡ G. Sieber,217,‡ H. J. Simonis,217,‡ F. M. Stober,217,‡ R. Ulrich,217,‡ J. Wagner-Kuhr,217,‡ S. Wayand,217,‡
T. Weiler,217,‡ S. Williamson,217,‡ C. Wöhrmann,217,‡ R. Wolf,217,‡ G. Anagnostou,218,‡ G. Daskalakis,218,‡ T. Geralis,218,‡
V. A. Giakoumopoulou,218,‡ A. Kyriakis,218,‡ D. Loukas,218,‡ A. Markou,218,‡ A. Psallidas,218,‡ I. Topsis-Giotis,218,‡
A. Agapitos,219,‡ S. Kesisoglou,219,‡ A. Panagiotou,219,‡ N. Saoulidou,219,‡ E. Tziaferi,219,‡ I. Evangelou,220,‡ G. Flouris,220,‡
C. Foudas,220,‡ P. Kokkas,220,‡ N. Loukas,220,‡ N. Manthos,220,‡ I. Papadopoulos,220,‡ E. Paradas,220,‡ J. Strologas,220,‡
G. Bencze,221,‡ C. Hajdu,221,‡ A. Hazi,221,‡ P. Hidas,221,‡ D. Horvath,221,fff,‡ F. Sikler,221,‡ V. Veszpremi,221,‡
G. Vesztergombi,221,ggg,‡ A. J. Zsigmond,221,‡ N. Beni,222,‡ S. Czellar,222,‡ J. Karancsi,222,hhh,‡ J. Molnar,222,‡ Z. Szillasi,222,‡
M. Bartók,223,iii,‡ A. Makovec,223,‡ P. Raics,223,‡ Z. L. Trocsanyi,223,‡ B. Ujvari,223,‡ P. Mal,224,‡ K. Mandal,224,‡ N. Sahoo,224,‡
S. K. Swain,224,‡ S. Bansal,225,‡ S. B. Beri,225,‡ V. Bhatnagar,225,‡ R. Chawla,225,‡ R. Gupta,225,‡ U. Bhawandeep,225,‡
A. K. Kalsi,225,‡ A. Kaur,225,‡ M. Kaur,225,‡ R. Kumar,225,‡ A. Mehta,225,‡ M. Mittal,225,‡ N. Nishu,225,‡ J. B. Singh,225,‡
G. Walia,225,‡ Ashok Kumar,226,‡ Arun Kumar,226,‡ A. Bhardwaj,226,‡ B. C. Choudhary,226,‡ R. B. Garg,226,‡ A. Kumar,226,‡
S. Malhotra,226,‡ M. Naimuddin,226,‡ K. Ranjan,226,‡ R. Sharma,226,‡ V. Sharma,226,‡ S. Banerjee,227,‡ S. Bhattacharya,227,‡
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-19
K. Chatterjee,227,‡ S. Dey,227,‡ S. Dutta,227,‡ Sa. Jain,227,‡ Sh. Jain,227,‡ R. Khurana,227,‡ N. Majumdar,227,‡ A. Modak,227,‡
K. Mondal,227,‡ S. Mukherjee,227,‡ S. Mukhopadhyay,227,‡ A. Roy,227,‡ D. Roy,227,‡ S. Roy Chowdhury,227,‡ S. Sarkar,227,‡
M. Sharan,227,‡ A. Abdulsalam,228,‡ R. Chudasama,228,‡ D. Dutta,228,‡ V. Jha,228,‡ V. Kumar,228,‡ A. K. Mohanty,228,oo,‡
L.M. Pant,228,‡ P. Shukla,228,‡ A. Topkar,228,‡ T. Aziz,229,‡ S. Banerjee,229,‡ S. Bhowmik,229,jjj,‡ R.M. Chatterjee,229,‡
R. K. Dewanjee,229,‡ S. Dugad,229,‡ S. Ganguly,229,‡ S. Ghosh,229,‡ M. Guchait,229,‡ A. Gurtu,229,kkk,‡ G. Kole,229,‡
S. Kumar,229,‡ B. Mahakud,229,‡ M. Maity,229,jjj,‡ G. Majumder,229,‡ K. Mazumdar,229,‡ S. Mitra,229,‡ G. B. Mohanty,229,‡
B. Parida,229,‡ T. Sarkar,229,jjj,‡ K. Sudhakar,229,‡ N. Sur,229,‡ B. Sutar,229,‡ N. Wickramage,229,lll,‡ S. Sharma,230,‡
H. Bakhshiansohi,231,‡ H. Behnamian,231,‡ S. M. Etesami,231,mmm,‡ A. Fahim,231,nnn,‡ R. Goldouzian,231,‡ M. Khakzad,231,‡
M. Mohammadi Najafabadi,231,‡ M. Naseri,231,‡ S. Paktinat Mehdiabadi,231,‡ F. Rezaei Hosseinabadi,231,‡
B. Safarzadeh,231,ooo,‡ M. Zeinali,231,‡ M. Felcini,232,‡ M. Grunewald,232,‡ M. Abbrescia,233a,233b,‡ C. Calabria,233a,233b,‡
C. Caputo,233a,233b,‡ S. S. Chhibra,233a,233b,‡ A. Colaleo,233a,‡ D. Creanza,233a,233c,‡ L. Cristella,233a,233b,‡
N. De Filippis,233a,233c,‡ M. De Palma,233a,233b,‡ L. Fiore,233a,‡ G. Iaselli,233a,233c,‡ G. Maggi,233a,233c,‡ M. Maggi,233a,‡
G. Miniello,233a,233b,‡ S. My,233a,233c,‡ S. Nuzzo,233a,233b,‡ A. Pompili,233a,233b,‡ G. Pugliese,233a,233c,‡ R. Radogna,233a,233b,‡
A. Ranieri,233a,‡ G. Selvaggi,233a,233b,‡ L. Silvestris,233a,oo,‡ R. Venditti,233a,233b,‡ P. Verwilligen,233a,‡ G. Abbiendi,234a,‡
C. Battilana,234a,oo,‡ A. C. Benvenuti,234a,‡ D. Bonacorsi,234a,234b,‡ S. Braibant-Giacomelli,234a,234b,‡ L. Brigliadori,234a,234b,‡
R. Campanini,234a,234b,‡ P. Capiluppi,234a,234b,‡ A. Castro,234a,234b,‡ F. R. Cavallo,234a,‡ G. Codispoti,234a,234b,‡
M. Cuffiani,234a,234b,‡ G.M. Dallavalle,234a,‡ F. Fabbri,234a,‡ A. Fanfani,234a,234b,‡ D. Fasanella,234a,234b,‡ P. Giacomelli,234a,‡
C. Grandi,234a,‡ L. Guiducci,234a,234b,‡ S. Marcellini,234a,‡ G. Masetti,234a,‡ A. Montanari,234a,‡ F. L. Navarria,234a,234b,‡
A. Perrotta,234a,‡ A.M. Rossi,234a,234b,‡ T. Rovelli,234a,234b,‡ G. P. Siroli,234a,234b,‡ N. Tosi,234a,234b,‡ R. Travaglini,234a,234b,‡
G. Cappello,235a,‡ M. Chiorboli,235a,235b,‡ S. Costa,235a,235b,‡ F. Giordano,235a,‡ R. Potenza,235a,235b,‡ A. Tricomi,235a,235b,‡
C. Tuve,235a,235b,‡ G. Barbagli,236a,‡ V. Ciulli,236a,236b,‡ C. Civinini,236a,‡ R. D’Alessandro,236a,236b,‡ E. Focardi,236a,236b,‡
S. Gonzi,236a,236b,‡ V. Gori,236a,236b,‡ P. Lenzi,236a,236b,‡ M. Meschini,236a,‡ S. Paoletti,236a,‡ G. Sguazzoni,236a,‡
A. Tropiano,236a,236b,‡ L. Viliani,236a,236b,‡ L. Benussi,237,‡ S. Bianco,237,‡ F. Fabbri,237,‡ D. Piccolo,237,‡ V. Calvelli,238a,238b,‡
F. Ferro,238a,‡ M. Lo Vetere,238a,238b,‡ E. Robutti,238a,‡ S. Tosi,238a,238b,‡ M. E. Dinardo,239a,239b,‡ S. Fiorendi,239a,239b,‡
S. Gennai,239a,‡ R. Gerosa,239a,239b,‡ A. Ghezzi,239a,239b,‡ P. Govoni,239a,239b,‡ S. Malvezzi,239a,‡ R. A. Manzoni,239a,239b,‡
B. Marzocchi,239a,239b,oo,‡ D. Menasce,239a,‡ L. Moroni,239a,‡ M. Paganoni,239a,239b,‡ D. Pedrini,239a,‡ S. Ragazzi,239a,239b,‡
N. Redaelli,239a,‡ T. Tabarelli de Fatis,239a,239b,‡ S. Buontempo,240a,‡ N. Cavallo,240a,240c,‡ S. Di Guida,240a,240d,oo,‡
M. Esposito,240a,240b,‡ F. Fabozzi,240a,240c,‡ A. O. M. Iorio,240a,240b,‡ G. Lanza,240a,‡ L. Lista,240a,‡ S. Meola,240a,240d,oo,‡
M. Merola,240a,‡ P. Paolucci,240a,oo,‡ C. Sciacca,240a,240b,‡ F. Thyssen,240a,‡ P. Azzi,241a,oo,‡ N. Bacchetta,241a,‡
D. Bisello,241a,241b,‡ A. Branca,241a,241b,‡ R. Carlin,241a,241b,‡ A. Carvalho Antunes De Oliveira,241a,241b,‡ P. Checchia,241a,‡
M. Dall’Osso,241a,241b,oo,‡ T. Dorigo,241a,‡ U. Dosselli,241a,‡ F. Gasparini,241a,241b,‡ U. Gasparini,241a,241b,‡ A. Gozzelino,241a,‡
K. Kanishchev,241a,241c,‡ S. Lacaprara,241a,‡ M. Margoni,241a,241b,‡ A. T. Meneguzzo,241a,241b,‡ J. Pazzini,241a,241b,‡
N. Pozzobon,241a,241b,‡ P. Ronchese,241a,241b,‡ F. Simonetto,241a,241b,‡ E. Torassa,241a,‡ M. Tosi,241a,241b,‡ M. Zanetti,241a,‡
P. Zotto,241a,241b,‡ A. Zucchetta,241a,241b,oo,‡ G. Zumerle,241a,241b,‡ A. Braghieri,242a,‡ M. Gabusi,242a,242b,‡ A. Magnani,242a,‡
S. P. Ratti,242a,242b,‡ V. Re,242a,‡ C. Riccardi,242a,242b,‡ P. Salvini,242a,‡ I. Vai,242a,‡ P. Vitulo,242a,242b,‡
L. Alunni Solestizi,243a,243b,‡ M. Biasini,243a,243b,‡ G.M. Bilei,243a,‡ D. Ciangottini,243a,243b,oo,‡ L. Fanò,243a,243b,‡
P. Lariccia,243a,243b,‡ G. Mantovani,243a,243b,‡ M. Menichelli,243a,‡ A. Saha,243a,‡ A. Santocchia,243a,243b,‡ A. Spiezia,243a,243b,‡
K. Androsov,244a,ppp,‡ P. Azzurri,244a,‡ G. Bagliesi,244a,‡ J. Bernardini,244a,‡ T. Boccali,244a,‡ G. Broccolo,244a,244c,‡
R. Castaldi,244a,‡ M. A. Ciocci,244a,ppp,‡ R. Dell’Orso,244a,‡ S. Donato,244a,244c,oo,‡ G. Fedi,244a,‡ L. Foà,244a,244c,,‡
A. Giassi,244a,‡ M. T. Grippo,244a,ppp,‡ F. Ligabue,244a,244c,‡ T. Lomtadze,244a,‡ L. Martini,244a,244b,‡ A. Messineo,244a,244b,‡
F. Palla,244a,‡ A. Rizzi,244a,244b,‡ A. Savoy-Navarro,244a,qqq,‡ A. T. Serban,244a,‡ P. Spagnolo,244a,‡ P. Squillacioti,244a,ppp,‡
R. Tenchini,244a,‡ G. Tonelli,244a,244b,‡ A. Venturi,244a,‡ P. G. Verdini,244a,‡ L. Barone,245a,245b,‡ F. Cavallari,245a,‡
G. D’imperio,245a,245b,oo,‡ D. Del Re,245a,245b,‡ M. Diemoz,245a,‡ S. Gelli,245a,245b,‡ C. Jorda,245a,‡ E. Longo,245a,245b,‡
F. Margaroli,245a,245b,‡ P. Meridiani,245a,‡ F. Micheli,245a,245b,‡ G. Organtini,245a,245b,‡ R. Paramatti,245a,‡ F. Preiato,245a,245b,‡
S. Rahatlou,245a,245b,‡ C. Rovelli,245a,‡ F. Santanastasio,245a,245b,‡ P. Traczyk,245a,245b,oo,‡ N. Amapane,246a,246b,‡
R. Arcidiacono,246a,246c,‡ S. Argiro,246a,246b,‡ M. Arneodo,246a,246c,‡ R. Bellan,246a,246b,‡ C. Biino,246a,‡ N. Cartiglia,246a,‡
M. Costa,246a,246b,‡ R. Covarelli,246a,246b,‡ A. Degano,246a,246b,‡ N. Demaria,246a,‡ L. Finco,246a,246b,oo,‡ B. Kiani,246a,246b,‡
C. Mariotti,246a,‡ S. Maselli,246a,‡ E. Migliore,246a,246b,‡ V. Monaco,246a,246b,‡ E. Monteil,246a,246b,‡ M. Musich,246a,‡
M.M. Obertino,246a,246b,‡ L. Pacher,246a,246b,‡ N. Pastrone,246a,‡ M. Pelliccioni,246a,‡ G. L. Pinna Angioni,246a,246b,‡
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-20
F. Ravera,246a,246b,‡ A. Romero,246a,246b,‡ M. Ruspa,246a,246c,‡ R. Sacchi,246a,246b,‡ A. Solano,246a,246b,‡ A. Staiano,246a,‡
U. Tamponi,246a,‡ S. Belforte,247a,‡ V. Candelise,247a,247b,oo,‡ M. Casarsa,247a,‡ F. Cossutti,247a,‡ G. Della Ricca,247a,247b,‡
B. Gobbo,247a,‡ C. La Licata,247a,247b,‡ M. Marone,247a,247b,‡ A. Schizzi,247a,247b,‡ T. Umer,247a,247b,‡ A. Zanetti,247a,‡
S. Chang,248,‡ A. Kropivnitskaya,248,‡ S. K. Nam,248,‡ D. H. Kim,249,‡ G. N. Kim,249,‡ M. S. Kim,249,‡ D. J. Kong,249,‡
S. Lee,249,‡ Y. D. Oh,249,‡ A. Sakharov,249,‡ D. C. Son,249,‡ J. A. Brochero Cifuentes,250,‡ H. Kim,250,‡ T. J. Kim,250,‡
M. S. Ryu,250,‡ S. Song,251,‡ S. Choi,252,‡ Y. Go,252,‡ D. Gyun,252,‡ B. Hong,252,‡ M. Jo,252,‡ H. Kim,252,‡ Y. Kim,252,‡
B. Lee,252,‡ K. Lee,252,‡ K. S. Lee,252,‡ S. Lee,252,‡ S. K. Park,252,‡ Y. Roh,252,‡ H. D. Yoo,253,‡ M. Choi,254,‡ J. H. Kim,254,‡
J. S. H. Lee,254,‡ I. C. Park,254,‡ G. Ryu,254,‡ Y. Choi,255,‡ Y. K. Choi,255,‡ J. Goh,255,‡ D. Kim,255,‡ E. Kwon,255,‡ J. Lee,255,‡
I. Yu,255,‡ A. Juodagalvis,256,‡ J. Vaitkus,256,‡ Z. A. Ibrahim,257,‡ J. R. Komaragiri,257,‡ M. A. B. Md Ali,257,rrr,‡
F. Mohamad Idris,257,‡ W. A. T. Wan Abdullah,257,‡ E. Casimiro Linares,258,‡ H. Castilla-Valdez,258,‡
E. De La Cruz-Burelo,258,‡ I. Heredia-de La Cruz,258,sss,‡ A. Hernandez-Almada,258,‡ R. Lopez-Fernandez,258,‡
A. Sanchez-Hernandez,258,‡ S. Carrillo Moreno,259,‡ F. Vazquez Valencia,259,‡ S. Carpinteyro,260,‡ I. Pedraza,260,‡
H. A. Salazar Ibarguen,260,‡ A. Morelos Pineda,261,‡ D. Krofcheck,262,‡ P. H. Butler,263,‡ S. Reucroft,263,‡ A. Ahmad,264,‡
M. Ahmad,264,‡ Q. Hassan,264,‡ H. R. Hoorani,264,‡ W. A. Khan,264,‡ T. Khurshid,264,‡ M. Shoaib,264,‡ H. Bialkowska,265,‡
M. Bluj,265,‡ B. Boimska,265,‡ T. Frueboes,265,‡ M. Górski,265,‡ M. Kazana,265,‡ K. Nawrocki,265,‡
K. Romanowska-Rybinska,265,‡ M. Szleper,265,‡ P. Zalewski,265,‡ G. Brona,266,‡ K. Bunkowski,266,‡ K. Doroba,266,‡
A. Kalinowski,266,‡ M. Konecki,266,‡ J. Krolikowski,266,‡ M. Misiura,266,‡ M. Olszewski,266,‡ M. Walczak,266,‡
P. Bargassa,267,‡ C. Beirão Da Cruz E Silva,267,‡ A. Di Francesco,267,‡ P. Faccioli,267,‡ P. G. Ferreira Parracho,267,‡
M. Gallinaro,267,‡ L. Lloret Iglesias,267,‡ F. Nguyen,267,‡ J. Rodrigues Antunes,267,‡ J. Seixas,267,‡ O. Toldaiev,267,‡
D. Vadruccio,267,‡ J. Varela,267,‡ P. Vischia,267,‡ S. Afanasiev,268,‡ P. Bunin,268,‡ M. Gavrilenko,268,‡ I. Golutvin,268,‡
I. Gorbunov,268,‡ A. Kamenev,268,‡ V. Karjavin,268,‡ V. Konoplyanikov,268,‡ A. Lanev,268,‡ A. Malakhov,268,‡
V. Matveev,268,ttt,‡ P. Moisenz,268,‡ V. Palichik,268,‡ V. Perelygin,268,‡ S. Shmatov,268,‡ S. Shulha,268,‡ N. Skatchkov,268,‡
V. Smirnov,268,‡ T. Toriashvili,268,uuu,‡ A. Zarubin,268,‡ V. Golovtsov,269,‡ Y. Ivanov,269,‡ V. Kim,269,vvv,‡ E. Kuznetsova,269,‡
P. Levchenko,269,‡ V. Murzin,269,‡ V. Oreshkin,269,‡ I. Smirnov,269,‡ V. Sulimov,269,‡ L. Uvarov,269,‡ S. Vavilov,269,‡
A. Vorobyev,269,‡ Yu. Andreev,270,‡ A. Dermenev,270,‡ S. Gninenko,270,‡ N. Golubev,270,‡ A. Karneyeu,270,‡ M. Kirsanov,270,‡
N. Krasnikov,270,‡ A. Pashenkov,270,‡ D. Tlisov,270,‡ A. Toropin,270,‡ V. Epshteyn,271,‡ V. Gavrilov,271,‡ N. Lychkovskaya,271,‡
V. Popov,271,‡ I. Pozdnyakov,271,‡ G. Safronov,271,‡ A. Spiridonov,271,‡ E. Vlasov,271,‡ A. Zhokin,271,‡ V. Andreev,272,‡
M. Azarkin,272,www,‡ I. Dremin,272,www,‡ M. Kirakosyan,272,‡ A. Leonidov,272,www,‡ G. Mesyats,272,‡ S. V. Rusakov,272,‡
A. Vinogradov,272,‡ A. Baskakov,273,‡ A. Belyaev,273,‡ E. Boos,273,‡ V. Bunichev,273,‡ M. Dubinin,273,xxx,‡ L. Dudko,273,‡
A. Ershov,273,‡ A. Gribushin,273,‡ V. Klyukhin,273,‡ O. Kodolova,273,‡ I. Lokhtin,273,‡ I. Myagkov,273,‡ S. Obraztsov,273,‡
S. Petrushanko,273,‡ V. Savrin,273,‡ I. Azhgirey,274,‡ I. Bayshev,274,‡ S. Bitioukov,274,‡ V. Kachanov,274,‡ A. Kalinin,274,‡
D. Konstantinov,274,‡ V. Krychkine,274,‡ V. Petrov,274,‡ R. Ryutin,274,‡ A. Sobol,274,‡ L. Tourtchanovitch,274,‡ S. Troshin,274,‡
N. Tyurin,274,‡ A. Uzunian,274,‡ A. Volkov,274,‡ P. Adzic,275,yyy,‡ M. Ekmedzic,275,‡ J. Milosevic,275,‡ V. Rekovic,275,‡
J. Alcaraz Maestre,276,‡ E. Calvo,276,‡ M. Cerrada,276,‡ M. Chamizo Llatas,276,‡ N. Colino,276,‡ B. De La Cruz,276,‡
A. Delgado Peris,276,‡ D. Domínguez Vázquez,276,‡ A. Escalante Del Valle,276,‡ C. Fernandez Bedoya,276,‡
J. P. Fernández Ramos,276,‡ J. Flix,276,‡ M. C. Fouz,276,‡ P. Garcia-Abia,276,‡ O. Gonzalez Lopez,276,‡ S. Goy Lopez,276,‡
J. M. Hernandez,276,‡ M. I. Josa,276,‡ E. Navarro De Martino,276,‡ A. Pérez-Calero Yzquierdo,276,‡ J. Puerta Pelayo,276,‡
A. Quintario Olmeda,276,‡ I. Redondo,276,‡ L. Romero,276,‡ M. S. Soares,276,‡ C. Albajar,277,‡ J. F. de Trocóniz,277,‡
M. Missiroli,277,‡ D. Moran,277,‡ H. Brun,278,‡ J. Cuevas,278,‡ J. Fernandez Menendez,278,‡ S. Folgueras,278,‡
I. Gonzalez Caballero,278,‡ E. Palencia Cortezon,278,‡ J. M. Vizan Garcia,278,‡ I. J. Cabrillo,279,‡ A. Calderon,279,‡
J. R. Castiñeiras De Saa,279,‡ J. Duarte Campderros,279,‡ M. Fernandez,279,‡ G. Gomez,279,‡ A. Graziano,279,‡
A. Lopez Virto,279,‡ J. Marco,279,‡ R. Marco,279,‡ C. Martinez Rivero,279,‡ F. Matorras,279,‡ F. J. Munoz Sanchez,279,‡
J. Piedra Gomez,279,‡ T. Rodrigo,279,‡ A. Y. Rodríguez-Marrero,279,‡ A. Ruiz-Jimeno,279,‡ L. Scodellaro,279,‡ I. Vila,279,‡
R. Vilar Cortabitarte,279,‡ D. Abbaneo,280,‡ E. Auffray,280,‡ G. Auzinger,280,‡ M. Bachtis,280,‡ P. Baillon,280,‡ A. H. Ball,280,‡
D. Barney,280,‡ A. Benaglia,280,‡ J. Bendavid,280,‡ L. Benhabib,280,‡ J. F. Benitez,280,‡ G.M. Berruti,280,‡ P. Bloch,280,‡
A. Bocci,280,‡ A. Bonato,280,‡ C. Botta,280,‡ H. Breuker,280,‡ T. Camporesi,280,‡ G. Cerminara,280,‡ S. Colafranceschi,280,zzz,‡
M. D’Alfonso,280,‡ D. d’Enterria,280,‡ A. Dabrowski,280,‡ V. Daponte,280,‡ A. David,280,‡ M. De Gruttola,280,‡ F. De Guio,280,‡
A. De Roeck,280,‡ S. De Visscher,280,‡ E. Di Marco,280,‡ M. Dobson,280,‡ M. Dordevic,280,‡ T. du Pree,280,‡
N. Dupont-Sagorin,280,‡ A. Elliott-Peisert,280,‡ G. Franzoni,280,‡ W. Funk,280,‡ D. Gigi,280,‡ K. Gill,280,‡ D. Giordano,280,‡
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-21
M. Girone,280,‡ F. Glege,280,‡ R. Guida,280,‡ S. Gundacker,280,‡ M. Guthoff,280,‡ J. Hammer,280,‡ M. Hansen,280,‡ P. Harris,280,‡
J. Hegeman,280,‡ V. Innocente,280,‡ P. Janot,280,‡ H. Kirschenmann,280,‡ M. J. Kortelainen,280,‡ K. Kousouris,280,‡
K. Krajczar,280,‡ P. Lecoq,280,‡ C. Lourenço,280,‡ M. T. Lucchini,280,‡ N. Magini,280,‡ L. Malgeri,280,‡ M. Mannelli,280,‡
J. Marrouche,280,‡ A. Martelli,280,‡ L. Masetti,280,‡ F. Meijers,280,‡ S. Mersi,280,‡ E. Meschi,280,‡ F. Moortgat,280,‡
S. Morovic,280,‡ M. Mulders,280,‡ M. V. Nemallapudi,280,‡ H. Neugebauer,280,‡ S. Orfanelli,280,aaaa,‡ L. Orsini,280,‡
L. Pape,280,‡ E. Perez,280,‡ A. Petrilli,280,‡ G. Petrucciani,280,‡ A. Pfeiffer,280,‡ D. Piparo,280,‡ A. Racz,280,‡ G. Rolandi,280,bbbb,‡
M. Rovere,280,‡ M. Ruan,280,‡ H. Sakulin,280,‡ C. Schäfer,280,‡ C. Schwick,280,‡ A. Sharma,280,‡ P. Silva,280,‡ M. Simon,280,‡
P. Sphicas,280,cccc,‡ D. Spiga,280,‡ J. Steggemann,280,‡ B. Stieger,280,‡ M. Stoye,280,‡ Y. Takahashi,280,‡ D. Treille,280,‡
A. Tsirou,280,‡ G. I. Veres,280,ggg,‡ N. Wardle,280,‡ H. K. Wöhri,280,‡ A. Zagozdzinska,280,dddd,‡ W. D. Zeuner,280,‡ W. Bertl,281,‡
K. Deiters,281,‡ W. Erdmann,281,‡ R. Horisberger,281,‡ Q. Ingram,281,‡ H. C. Kaestli,281,‡ D. Kotlinski,281,‡
U. Langenegger,281,‡ T. Rohe,281,‡ F. Bachmair,282,‡ L. Bäni,282,‡ L. Bianchini,282,‡ M. A. Buchmann,282,‡ B. Casal,282,‡
G. Dissertori,282,‡ M. Dittmar,282,‡ M. Donegà,282,‡ M. Dünser,282,‡ P. Eller,282,‡ C. Grab,282,‡ C. Heidegger,282,‡ D. Hits,282,‡
J. Hoss,282,‡ G. Kasieczka,282,‡ W. Lustermann,282,‡ B. Mangano,282,‡ A. C. Marini,282,‡ M. Marionneau,282,‡
P. Martinez Ruiz del Arbol,282,‡ M.Masciovecchio,282,‡ D. Meister,282,‡ P. Musella,282,‡ F. Nessi-Tedaldi,282,‡ F. Pandolfi,282,‡
J. Pata,282,‡ F. Pauss,282,‡ L. Perrozzi,282,‡ M. Peruzzi,282,‡ M. Quittnat,282,‡ M. Rossini,282,‡ A. Starodumov,282,eeee,‡
M. Takahashi,282,‡ V. R. Tavolaro,282,‡ K. Theofilatos,282,‡ R. Wallny,282,‡ H. A. Weber,282,‡ T. K. Aarrestad,283,‡
C. Amsler,283,ffff,‡ M. F. Canelli,283,‡ V. Chiochia,283,‡ A. De Cosa,283,‡ C. Galloni,283,‡ A. Hinzmann,283,‡ T. Hreus,283,‡
B. Kilminster,283,‡ C. Lange,283,‡ J. Ngadiuba,283,‡ D. Pinna,283,‡ P. Robmann,283,‡ F. J. Ronga,283,‡ D. Salerno,283,‡
S. Taroni,283,‡ Y. Yang,283,‡ M. Cardaci,284,‡ K. H. Chen,284,‡ T. H. Doan,284,‡ C. Ferro,284,‡ M. Konyushikhin,284,‡
C.M. Kuo,284,‡ W. Lin,284,‡ Y. J. Lu,284,‡ R. Volpe,284,‡ S. S. Yu,284,‡ P. Chang,285,‡ Y. H. Chang,285,‡ Y.W. Chang,285,‡
Y. Chao,285,‡ K. F. Chen,285,‡ P. H. Chen,285,‡ C. Dietz,285,‡ F. Fiori,285,‡ U. Grundler,285,‡ W.-S. Hou,285,‡ Y. Hsiung,285,‡
Y. F. Liu,285,‡ R.-S. Lu,285,‡ M. Miñano Moya,285,‡ E. Petrakou,285,‡ J. f. Tsai,285,‡ Y.M. Tzeng,285,‡ R. Wilken,285,‡
B. Asavapibhop,286,‡ K. Kovitanggoon,286,‡ G. Singh,286,‡ N. Srimanobhas,286,‡ N. Suwonjandee,286,‡ A. Adiguzel,287,‡
S. Cerci,287,gggg,‡ C. Dozen,287,‡ S. Girgis,287,‡ G. Gokbulut,287,‡ Y. Guler,287,‡ E. Gurpinar,287,‡ I. Hos,287,‡
E. E. Kangal,287,hhhh,‡ A. Kayis Topaksu,287,‡ G. Onengut,287,iiii,‡ K. Ozdemir,287,jjjj,‡ S. Ozturk,287,kkkk,‡ B. Tali,287,gggg,‡
H. Topakli,287,kkkk,‡ M. Vergili,287,‡ C. Zorbilmez,287,‡ I. V. Akin,288,‡ B. Bilin,288,‡ S. Bilmis,288,‡ B. Isildak,288,llll,‡
G. Karapinar,288,mmmm,‡ U. E. Surat,288,‡ M. Yalvac,288,‡ M. Zeyrek,288,‡ E. A. Albayrak,289,nnnn,‡ E. Gülmez,289,‡
M. Kaya,289,oooo,‡ O. Kaya,289,pppp,‡ T. Yetkin,289,qqqq,‡ K. Cankocak,290,‡ S. Sen,290,rrrr,‡ F. I. Vardarlı,290,‡ B. Grynyov,291,‡
L. Levchuk,292,‡ P. Sorokin,292,‡ R. Aggleton,293,‡ F. Ball,293,‡ L. Beck,293,‡ J. J. Brooke,293,‡ E. Clement,293,‡ D. Cussans,293,‡
H. Flacher,293,‡ J. Goldstein,293,‡ M. Grimes,293,‡ G. P. Heath,293,‡ H. F. Heath,293,‡ J. Jacob,293,‡ L. Kreczko,293,‡
C. Lucas,293,‡ Z. Meng,293,‡ D.M. Newbold,293,ssss,‡ S. Paramesvaran,293,‡ A. Poll,293,‡ T. Sakuma,293,‡
S. Seif El Nasr-storey,293,‡ S. Senkin,293,‡ D. Smith,293,‡ V. J. Smith,293,‡ K.W. Bell,294,‡ A. Belyaev,294,tttt,‡ C. Brew,294,‡
R.M. Brown,294,‡ D. J. A. Cockerill,294,‡ J. A. Coughlan,294,‡ K. Harder,294,‡ S. Harper,294,‡ E. Olaiya,294,‡ D. Petyt,294,‡
C. H. Shepherd-Themistocleous,294,‡ A. Thea,294,‡ I. R. Tomalin,294,‡ T. Williams,294,‡ W. J. Womersley,294,‡ S. D. Worm,294,‡
M. Baber,295,‡ R. Bainbridge,295,‡ O. Buchmuller,295,‡ A. Bundock,295,‡ D. Burton,295,‡ S. Casasso,295,‡ M. Citron,295,‡
D. Colling,295,‡ L. Corpe,295,‡ N. Cripps,295,‡ P. Dauncey,295,‡ G. Davies,295,‡ A. De Wit,295,‡ M. Della Negra,295,‡
P. Dunne,295,‡ A. Elwood,295,‡ W. Ferguson,295,‡ J. Fulcher,295,‡ D. Futyan,295,‡ G. Hall,295,‡ G. Iles,295,‡ G. Karapostoli,295,‡
M. Kenzie,295,‡ R. Lane,295,‡ R. Lucas,295,ssss,‡ L. Lyons,295,‡ A.-M. Magnan,295,‡ S. Malik,295,‡ J. Nash,295,‡
A. Nikitenko,295,eeee,‡ J. Pela,295,‡ M. Pesaresi,295,‡ K. Petridis,295,‡ D.M. Raymond,295,‡ A. Richards,295,‡ A. Rose,295,‡
C. Seez,295,‡ P. Sharp,295,,‡ A. Tapper,295,‡ K. Uchida,295,‡ M. Vazquez Acosta,295,uuuu,‡ T. Virdee,295,‡ S. C. Zenz,295,‡
J. E. Cole,296,‡ P. R. Hobson,296,‡ A. Khan,296,‡ P. Kyberd,296,‡ D. Leggat,296,‡ D. Leslie,296,‡ I. D. Reid,296,‡ P. Symonds,296,‡
L. Teodorescu,296,‡ M. Turner,296,‡ A. Borzou,297,‡ J. Dittmann,297,‡ K. Hatakeyama,297,‡ A. Kasmi,297,‡ H. Liu,297,‡
N. Pastika,297,‡ O. Charaf,298,‡ S. I. Cooper,298,‡ C. Henderson,298,‡ P. Rumerio,298,‡ A. Avetisyan,299,‡ T. Bose,299,‡
C. Fantasia,299,‡ D. Gastler,299,‡ P. Lawson,299,‡ D. Rankin,299,‡ C. Richardson,299,‡ J. Rohlf,299,‡ J. St. John,299,‡ L. Sulak,299,‡
D. Zou,299,‡ J. Alimena,300,‡ E. Berry,300,‡ S. Bhattacharya,300,‡ D. Cutts,300,‡ N. Dhingra,300,‡ A. Ferapontov,300,‡
A. Garabedian,300,‡ U. Heintz,300,‡ E. Laird,300,‡ G. Landsberg,300,‡ Z. Mao,300,‡ M. Narain,300,‡ S. Sagir,300,‡
T. Sinthuprasith,300,‡ R. Breedon,301,‡G. Breto,301,‡M. Calderon De La Barca Sanchez,301,‡ S. Chauhan,301,‡M. Chertok,301,‡
J. Conway,301,‡ R. Conway,301,‡ P. T. Cox,301,‡ R. Erbacher,301,‡M. Gardner,301,‡W. Ko,301,‡ R. Lander,301,‡M.Mulhearn,301,‡
D. Pellett,301,‡ J. Pilot,301,‡ F. Ricci-Tam,301,‡ S. Shalhout,301,‡ J. Smith,301,‡ M. Squires,301,‡ D. Stolp,301,‡ M. Tripathi,301,‡
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-22
S. Wilbur,301,‡ R. Yohay,301,‡ R. Cousins,302,‡ P. Everaerts,302,‡ C. Farrell,302,‡ J. Hauser,302,‡ M. Ignatenko,302,‡
G. Rakness,302,‡ D. Saltzberg,302,‡ E. Takasugi,302,‡ V. Valuev,302,‡ M. Weber,302,‡ K. Burt,303,‡ R. Clare,303,‡ J. Ellison,303,‡
J. W. Gary,303,‡ G. Hanson,303,‡ J. Heilman,303,‡ M. Ivova Rikova,303,‡ P. Jandir,303,‡ E. Kennedy,303,‡ F. Lacroix,303,‡
O. R. Long,303,‡ A. Luthra,303,‡ M. Malberti,303,‡ M. Olmedo Negrete,303,‡ A. Shrinivas,303,‡ S. Sumowidagdo,303,‡
H. Wei,303,‡ S. Wimpenny,303,‡ J. G. Branson,304,‡ G. B. Cerati,304,‡ S. Cittolin,304,‡ R. T. D’Agnolo,304,‡ A. Holzner,304,‡
R. Kelley,304,‡ D. Klein,304,‡ J. Letts,304,‡ I. Macneill,304,‡ D. Olivito,304,‡ S. Padhi,304,‡ M. Pieri,304,‡ M. Sani,304,‡
V. Sharma,304,‡ S. Simon,304,‡ M. Tadel,304,‡ Y. Tu,304,‡ A. Vartak,304,‡ S. Wasserbaech,304,vvvv,‡ C. Welke,304,‡
F. Würthwein,304,‡ A. Yagil,304,‡ G. Zevi Della Porta,304,‡ D. Barge,305,‡ J. Bradmiller-Feld,305,‡ C. Campagnari,305,‡
A. Dishaw,305,‡ V. Dutta,305,‡ K. Flowers,305,‡ M. Franco Sevilla,305,‡ P. Geffert,305,‡ C. George,305,‡ F. Golf,305,‡
L. Gouskos,305,‡ J. Gran,305,‡ J. Incandela,305,‡ C. Justus,305,‡ N. Mccoll,305,‡ S. D. Mullin,305,‡ J. Richman,305,‡ D. Stuart,305,‡
I. Suarez,305,‡ W. To,305,‡ C. West,305,‡ J. Yoo,305,‡ D. Anderson,306,‡ A. Apresyan,306,‡ A. Bornheim,306,‡ J. Bunn,306,‡
Y. Chen,306,‡ J. Duarte,306,‡ A. Mott,306,‡ H. B. Newman,306,‡ C. Pena,306,‡ M. Pierini,306,‡ M. Spiropulu,306,‡
J. R. Vlimant,306,‡ S. Xie,306,‡ R. Y. Zhu,306,‡ V. Azzolini,307,‡ A. Calamba,307,‡ B. Carlson,307,‡ T. Ferguson,307,‡
Y. Iiyama,307,‡ M. Paulini,307,‡ J. Russ,307,‡ M. Sun,307,‡ H. Vogel,307,‡ I. Vorobiev,307,‡ J. P. Cumalat,308,‡ W. T. Ford,308,‡
A. Gaz,308,‡ F. Jensen,308,‡ A. Johnson,308,‡ M. Krohn,308,‡ T. Mulholland,308,‡ U. Nauenberg,308,‡ J. G. Smith,308,‡
K. Stenson,308,‡ S. R. Wagner,308,‡ J. Alexander,309,‡ A. Chatterjee,309,‡ J. Chaves,309,‡ J. Chu,309,‡ S. Dittmer,309,‡
N. Eggert,309,‡ N. Mirman,309,‡ G. Nicolas Kaufman,309,‡ J. R. Patterson,309,‡ A. Rinkevicius,309,‡ A. Ryd,309,‡
L. Skinnari,309,‡ L. Soffi,309,‡ W. Sun,309,‡ S. M. Tan,309,‡ W.D. Teo,309,‡ J. Thom,309,‡ J. Thompson,309,‡ J. Tucker,309,‡
Y. Weng,309,‡ P. Wittich,309,‡ S. Abdullin,310,‡ M. Albrow,310,‡ J. Anderson,310,‡ G. Apollinari,310,‡ L. A. T. Bauerdick,310,‡
A. Beretvas,310,‡ J. Berryhill,310,‡ P. C. Bhat,310,‡ G. Bolla,310,‡ K. Burkett,310,‡ J. N. Butler,310,‡ H.W. K. Cheung,310,‡
F. Chlebana,310,‡ S. Cihangir,310,‡ V. D. Elvira,310,‡ I. Fisk,310,‡ J. Freeman,310,‡ E. Gottschalk,310,‡ L. Gray,310,‡ D. Green,310,‡
S. Grünendahl,310,‡ O. Gutsche,310,‡ J. Hanlon,310,‡ D. Hare,310,‡ R.M. Harris,310,‡ J. Hirschauer,310,‡ B. Hooberman,310,‡
Z. Hu,310,‡ S. Jindariani,310,‡ M. Johnson,310,‡ U. Joshi,310,‡ A.W. Jung,310,‡ B. Klima,310,‡ B. Kreis,310,‡ S. Kwan,310,,‡
S. Lammel,310,‡ J. Linacre,310,‡ D. Lincoln,310,‡ R. Lipton,310,‡ T. Liu,310,‡ R. Lopes De Sá,310,‡ J. Lykken,310,‡
K. Maeshima,310,‡ J. M. Marraffino,310,‡ V. I. Martinez Outschoorn,310,‡ S. Maruyama,310,‡ D. Mason,310,‡ P. McBride,310,‡
P. Merkel,310,‡ K. Mishra,310,‡ S. Mrenna,310,‡ S. Nahn,310,‡ C. Newman-Holmes,310,‡ V. O’Dell,310,‡ O. Prokofyev,310,‡
E. Sexton-Kennedy,310,‡ A. Soha,310,‡ W. J. Spalding,310,‡ L. Spiegel,310,‡ L. Taylor,310,‡ S. Tkaczyk,310,‡ N. V. Tran,310,‡
L. Uplegger,310,‡ E.W. Vaandering,310,‡ C. Vernieri,310,‡ M. Verzocchi,310,‡ R. Vidal,310,‡ A. Whitbeck,310,‡ F. Yang,310,‡
H. Yin,310,‡ D. Acosta,311,‡ P. Avery,311,‡ P. Bortignon,311,‡ D. Bourilkov,311,‡ A. Carnes,311,‡ M. Carver,311,‡ D. Curry,311,‡
S. Das,311,‡ G. P. Di Giovanni,311,‡ R. D. Field,311,‡ M. Fisher,311,‡ I. K. Furic,311,‡ J. Hugon,311,‡ J. Konigsberg,311,‡
A. Korytov,311,‡ J. F. Low,311,‡ P. Ma,311,‡ K. Matchev,311,‡ H. Mei,311,‡ P. Milenovic,311,wwww,‡ G. Mitselmakher,311,‡
L. Muniz,311,‡ D. Rank,311,‡ L. Shchutska,311,‡ M. Snowball,311,‡ D. Sperka,311,‡ S. j. Wang,311,‡ J. Yelton,311,‡
S. Hewamanage,312,‡ S. Linn,312,‡ P. Markowitz,312,‡ G. Martinez,312,‡ J. L. Rodriguez,312,‡ A. Ackert,313,‡ J. R. Adams,313,‡
T. Adams,313,‡ A. Askew,313,‡ J. Bochenek,313,‡ B. Diamond,313,‡ J. Haas,313,‡ S. Hagopian,313,‡ V. Hagopian,313,‡
K. F. Johnson,313,‡ A. Khatiwada,313,‡ H. Prosper,313,‡ V. Veeraraghavan,313,‡ M. Weinberg,313,‡ V. Bhopatkar,314,‡
M. Hohlmann,314,‡ H. Kalakhety,314,‡ D. Mareskas-palcek,314,‡ T. Roy,314,‡ F. Yumiceva,314,‡ M. R. Adams,315,‡
L. Apanasevich,315,‡ D. Berry,315,‡ R. R. Betts,315,‡ I. Bucinskaite,315,‡ R. Cavanaugh,315,‡ O. Evdokimov,315,‡
L. Gauthier,315,‡ C. E. Gerber,315,‡ D. J. Hofman,315,‡ P. Kurt,315,‡ C. O’Brien,315,‡ I. D. Sandoval Gonzalez,315,‡
C. Silkworth,315,‡ P. Turner,315,‡ N. Varelas,315,‡ Z. Wu,315,‡ M. Zakaria,315,‡ B. Bilki,316,xxxx,‡ W. Clarida,316,‡ K. Dilsiz,316,‡
S. Durgut,316,‡ R. P. Gandrajula,316,‡ M. Haytmyradov,316,‡ V. Khristenko,316,‡ J.-P. Merlo,316,‡ H. Mermerkaya,316,yyyy,‡
A. Mestvirishvili,316,‡ A. Moeller,316,‡ J. Nachtman,316,‡ H. Ogul,316,‡ Y. Onel,316,‡ F. Ozok,316,nnnn,‡ A. Penzo,316,‡
C. Snyder,316,‡ P. Tan,316,‡ E. Tiras,316,‡ J. Wetzel,316,‡ K. Yi,316,‡ I. Anderson,317,‡ B. A. Barnett,317,‡ B. Blumenfeld,317,‡
D. Fehling,317,‡ L. Feng,317,‡ A. V. Gritsan,317,‡ P. Maksimovic,317,‡ C. Martin,317,‡ K. Nash,317,‡ M. Osherson,317,‡
M. Swartz,317,‡ M. Xiao,317,‡ Y. Xin,317,‡ P. Baringer,318,‡ A. Bean,318,‡ G. Benelli,318,‡ C. Bruner,318,‡ J. Gray,318,‡
R. P. Kenny III,318,‡ D. Majumder,318,‡ M. Malek,318,‡ M. Murray,318,‡ D. Noonan,318,‡ S. Sanders,318,‡ R. Stringer,318,‡
Q. Wang,318,‡ J. S. Wood,318,‡ I. Chakaberia,319,‡ A. Ivanov,319,‡ K. Kaadze,319,‡ S. Khalil,319,‡ M. Makouski,319,‡
Y. Maravin,319,‡ L. K. Saini,319,‡ N. Skhirtladze,319,‡ I. Svintradze,319,‡ S. Toda,319,‡ D. Lange,320,‡ F. Rebassoo,320,‡
D. Wright,320,‡ C. Anelli,321,‡ A. Baden,321,‡ O. Baron,321,‡ A. Belloni,321,‡ B. Calvert,321,‡ S. C. Eno,321,‡ C. Ferraioli,321,‡
J. A. Gomez,321,‡ N. J. Hadley,321,‡ S. Jabeen,321,‡ R. G. Kellogg,321,‡ T. Kolberg,321,‡ J. Kunkle,321,‡ Y. Lu,321,‡
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-23
A. C. Mignerey,321,‡ K. Pedro,321,‡ Y. H. Shin,321,‡ A. Skuja,321,‡ M. B. Tonjes,321,‡ S. C. Tonwar,321,‡ A. Apyan,322,‡
R. Barbieri,322,‡ A. Baty,322,‡ K. Bierwagen,322,‡ S. Brandt,322,‡ W. Busza,322,‡ I. A. Cali,322,‡ L. Di Matteo,322,‡
G. Gomez Ceballos,322,‡ M. Goncharov,322,‡ D. Gulhan,322,‡ G.M. Innocenti,322,‡ M. Klute,322,‡ D. Kovalskyi,322,‡
Y. S. Lai,322,‡ Y.-J. Lee,322,‡ A. Levin,322,‡ P. D. Luckey,322,‡ C. Mcginn,322,‡ X. Niu,322,‡ C. Paus,322,‡ D. Ralph,322,‡
C. Roland,322,‡ G. Roland,322,‡ G. S. F. Stephans,322,‡ K. Sumorok,322,‡ M. Varma,322,‡ D. Velicanu,322,‡ J. Veverka,322,‡
J. Wang,322,‡ T.W. Wang,322,‡ B. Wyslouch,322,‡ M. Yang,322,‡ V. Zhukova,322,‡ B. Dahmes,323,‡ A. Finkel,323,‡ A. Gude,323,‡
P. Hansen,323,‡ S. Kalafut,323,‡ S. C. Kao,323,‡ K. Klapoetke,323,‡ Y. Kubota,323,‡ Z. Lesko,323,‡ J. Mans,323,‡
S. Nourbakhsh,323,‡ N. Ruckstuhl,323,‡ R. Rusack,323,‡ N. Tambe,323,‡ J. Turkewitz,323,‡ J. G. Acosta,324,‡ S. Oliveros,324,‡
E. Avdeeva,325,‡ K. Bloom,325,‡ S. Bose,325,‡ D. R. Claes,325,‡ A. Dominguez,325,‡ C. Fangmeier,325,‡ R. Gonzalez Suarez,325,‡
R. Kamalieddin,325,‡ J. Keller,325,‡ D. Knowlton,325,‡ I. Kravchenko,325,‡ J. Lazo-Flores,325,‡ F. Meier,325,‡ J. Monroy,325,‡
F. Ratnikov,325,‡ J. E. Siado,325,‡ G. R. Snow,325,‡ M. Alyari,326,‡ J. Dolen,326,‡ J. George,326,‡ A. Godshalk,326,‡ I. Iashvili,326,‡
J. Kaisen,326,‡ A. Kharchilava,326,‡ A. Kumar,326,‡ S. Rappoccio,326,‡ G. Alverson,327,‡ E. Barberis,327,‡ D. Baumgartel,327,‡
M. Chasco,327,‡ A. Hortiangtham,327,‡ A. Massironi,327,‡ D.M. Morse,327,‡ D. Nash,327,‡ T. Orimoto,327,‡
R. Teixeira De Lima,327,‡ D. Trocino,327,‡ R.-J. Wang,327,‡ D. Wood,327,‡ J. Zhang,327,‡ K. A. Hahn,328,‡ A. Kubik,328,‡
N. Mucia,328,‡ N. Odell,328,‡ B. Pollack,328,‡ A. Pozdnyakov,328,‡ M. Schmitt,328,‡ S. Stoynev,328,‡ K. Sung,328,‡
M. Trovato,328,‡ M. Velasco,328,‡ S. Won,328,‡ A. Brinkerhoff,329,‡ N. Dev,329,‡ M. Hildreth,329,‡ C. Jessop,329,‡
D. J. Karmgard,329,‡ N. Kellams,329,‡ K. Lannon,329,‡ S. Lynch,329,‡ N. Marinelli,329,‡ F. Meng,329,‡ C. Mueller,329,‡
Y. Musienko,329,ttt,‡ T. Pearson,329,‡ M. Planer,329,‡ R. Ruchti,329,‡ G. Smith,329,‡ N. Valls,329,‡ M. Wayne,329,‡ M. Wolf,329,‡
A. Woodard,329,‡ L. Antonelli,330,‡ J. Brinson,330,‡ B. Bylsma,330,‡ L. S. Durkin,330,‡ S. Flowers,330,‡ A. Hart,330,‡ C. Hill,330,‡
R. Hughes,330,‡ K. Kotov,330,‡ T. Y. Ling,330,‡ B. Liu,330,‡ W. Luo,330,‡ D. Puigh,330,‡ M. Rodenburg,330,‡ B. L. Winer,330,‡
H.W. Wulsin,330,‡ O. Driga,331,‡ P. Elmer,331,‡ J. Hardenbrook,331,‡ P. Hebda,331,‡ S. A. Koay,331,‡ P. Lujan,331,‡
D. Marlow,331,‡ T. Medvedeva,331,‡ M. Mooney,331,‡ J. Olsen,331,‡ C. Palmer,331,‡ P. Piroué,331,‡ X. Quan,331,‡ H. Saka,331,‡
D. Stickland,331,‡ C. Tully,331,‡ J. S. Werner,331,‡ A. Zuranski,331,‡ V. E. Barnes,332,‡ D. Benedetti,332,‡ D. Bortoletto,332,‡
L. Gutay,332,‡M. K. Jha,332,‡M. Jones,332,‡K. Jung,332,‡M. Kress,332,‡N. Leonardo,332,‡D. H. Miller,332,‡N. Neumeister,332,‡
F. Primavera,332,‡ B. C. Radburn-Smith,332,‡ X. Shi,332,‡ I. Shipsey,332,‡ D. Silvers,332,‡ J. Sun,332,‡ A. Svyatkovskiy,332,‡
F. Wang,332,‡ W. Xie,332,‡ L. Xu,332,‡ J. Zablocki,332,‡ N. Parashar,333,‡ J. Stupak,333,‡ A. Adair,334,‡ B. Akgun,334,‡
Z. Chen,334,‡ K.M. Ecklund,334,‡ F. J. M. Geurts,334,‡ M. Guilbaud,334,‡ W. Li,334,‡ B. Michlin,334,‡ M. Northup,334,‡
B. P. Padley,334,‡ R. Redjimi,334,‡ J. Roberts,334,‡ J. Rorie,334,‡ Z. Tu,334,‡ J. Zabel,334,‡ B. Betchart,335,‡ A. Bodek,335,‡
P. de Barbaro,335,‡ R. Demina,335,‡ Y. Eshaq,335,‡ T. Ferbel,335,‡ M. Galanti,335,‡ A. Garcia-Bellido,335,‡ P. Goldenzweig,335,‡
J. Han,335,‡ A. Harel,335,‡ O. Hindrichs,335,‡ A. Khukhunaishvili,335,‡ G. Petrillo,335,‡ M. Verzetti,335,‡ L. Demortier,336,‡
S. Arora,337,‡ A. Barker,337,‡ J. P. Chou,337,‡ C. Contreras-Campana,337,‡ E. Contreras-Campana,337,‡ D. Duggan,337,‡
D. Ferencek,337,‡ Y. Gershtein,337,‡ R. Gray,337,‡ E. Halkiadakis,337,‡ D. Hidas,337,‡ E. Hughes,337,‡ S. Kaplan,337,‡
R. Kunnawalkam Elayavalli,337,‡ A. Lath,337,‡ S. Panwalkar,337,‡ M. Park,337,‡ S. Salur,337,‡ S. Schnetzer,337,‡
D. Sheffield,337,‡ S. Somalwar,337,‡ R. Stone,337,‡ S. Thomas,337,‡ P. Thomassen,337,‡ M. Walker,337,‡ M. Foerster,338,‡
G. Riley,338,‡ K. Rose,338,‡ S. Spanier,338,‡ A. York,338,‡ O. Bouhali,339,zzzz,‡ A. Castaneda Hernandez,339,‡ M. Dalchenko,339,‡
M. De Mattia,339,‡ A. Delgado,339,‡ S. Dildick,339,‡ R. Eusebi,339,‡ W. Flanagan,339,‡ J. Gilmore,339,‡ T. Kamon,339,aaaaa,‡
V. Krutelyov,339,‡ R. Montalvo,339,‡ R. Mueller,339,‡ I. Osipenkov,339,‡ Y. Pakhotin,339,‡ R. Patel,339,‡ A. Perloff,339,‡
J. Roe,339,‡ A. Rose,339,‡ A. Safonov,339,‡ A. Tatarinov,339,‡ K. A. Ulmer,339,oo,‡ N. Akchurin,340,‡ C. Cowden,340,‡
J. Damgov,340,‡ C. Dragoiu,340,‡ P. R. Dudero,340,‡ J. Faulkner,340,‡ S. Kunori,340,‡ K. Lamichhane,340,‡ S.W. Lee,340,‡
T. Libeiro,340,‡ S. Undleeb,340,‡ I. Volobouev,340,‡ E. Appelt,341,‡ A. G. Delannoy,341,‡ S. Greene,341,‡ A. Gurrola,341,‡
R. Janjam,341,‡ W. Johns,341,‡ C. Maguire,341,‡ Y. Mao,341,‡ A. Melo,341,‡ P. Sheldon,341,‡ B. Snook,341,‡ S. Tuo,341,‡
J. Velkovska,341,‡ Q. Xu,341,‡ M.W. Arenton,342,‡ S. Boutle,342,‡ B. Cox,342,‡ B. Francis,342,‡ J. Goodell,342,‡ R. Hirosky,342,‡
A. Ledovskoy,342,‡ H. Li,342,‡ C. Lin,342,‡ C. Neu,342,‡ E. Wolfe,342,‡ J. Wood,342,‡ F. Xia,342,‡ C. Clarke,343,‡ R. Harr,343,‡
P. E. Karchin,343,‡ C. Kottachchi Kankanamge Don,343,‡ P. Lamichhane,343,‡ J. Sturdy,343,‡ D. A. Belknap,344,‡
D. Carlsmith,344,‡ M. Cepeda,344,‡ A. Christian,344,‡ S. Dasu,344,‡ L. Dodd,344,‡ S. Duric,344,‡ E. Friis,344,‡ B. Gomber,344,‡
R. Hall-Wilton,344,‡ M. Herndon,344,‡ A. Hervé,344,‡ P. Klabbers,344,‡ A. Lanaro,344,‡ A. Levine,344,‡ K. Long,344,‡
R. Loveless,344,‡ A. Mohapatra,344,‡ I. Ojalvo,344,‡ T. Perry,344,‡ G. A. Pierro,344,‡ G. Polese,344,‡ I. Ross,344,‡ T. Ruggles,344,‡
T. Sarangi,344,‡ A. Savin,344,‡ A. Sharma,344,‡ N. Smith,344,‡ W. H. Smith,344,‡ D. Taylor,344,‡ and N. Woods344,‡
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-24
(ATLAS Collaboration)†(CMS Collaboration)‡
1Department of Physics, University of Adelaide, Adelaide, Australia2Physics Department, SUNY Albany, Albany, New York, USA
3Department of Physics, University of Alberta, Edmonton, Alberta, Canada4aDepartment of Physics, Ankara University, Ankara, Turkey
4bIstanbul Aydin University, Istanbul, Turkey4cDivision of Physics, TOBB University of Economics and Technology, Ankara, Turkey
5LAPP, CNRS/IN2P3 and Université Savoie Mont Blanc, Annecy-le-Vieux, France6High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois, USA
7Department of Physics, University of Arizona, Tucson, Arizona, USA8Department of Physics, The University of Texas at Arlington, Arlington, Texas, USA
9Physics Department, University of Athens, Athens, Greece10Physics Department, National Technical University of Athens, Zografou, Greece
11Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan12Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona, Barcelona, Spain
13Institute of Physics, University of Belgrade, Belgrade, Serbia14Department for Physics and Technology, University of Bergen, Bergen, Norway
15Physics Division, Lawrence Berkeley National Laboratory and University of California, Berkeley, California, USA16Department of Physics, Humboldt University, Berlin, Germany
17Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics, University of Bern, Bern, Switzerland18School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom
19aDepartment of Physics, Bogazici University, Istanbul, Turkey19bDepartment of Physics, Dogus University, Istanbul, Turkey
19cDepartment of Physics Engineering, Gaziantep University, Gaziantep, Turkey20aINFN Sezione di Bologna, Bologna, Italy
20bDipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy21Physikalisches Institut, University of Bonn, Bonn, Germany
22Department of Physics, Boston University, Boston, Massachusetts, USA23Department of Physics, Brandeis University, Waltham, Massachusetts, USA
24aUniversidade Federal do Rio De Janeiro COPPE/EE/IF, Rio de Janeiro, Brazil24bElectrical Circuits Department, Federal University of Juiz de Fora (UFJF), Juiz de Fora, Brazil
24cFederal University of Sao Joao del Rei (UFSJ), Sao Joao del Rei, Brazil24dInstituto de Fisica, Universidade de Sao Paulo, Sao Paulo, Brazil
25Physics Department, Brookhaven National Laboratory, Upton, New York, USA26aNational Institute of Physics and Nuclear Engineering, Bucharest, Romania
26bNational Institute for Research and Development of Isotopic and Molecular Technologies,Physics Department, Cluj Napoca, Romania
26cUniversity Politehnica Bucharest, Bucharest, Romania26dWest University in Timisoara, Timisoara, Romania
27Departamento de Física, Universidad de Buenos Aires, Buenos Aires, Argentina28Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
29Department of Physics, Carleton University, Ottawa, Ontario, Canada30CERN, Geneva, Switzerland
31Enrico Fermi Institute, University of Chicago, Chicago, Illinois, USA32aDepartamento de Física, Pontificia Universidad Católica de Chile, Santiago, Chile
32bDepartamento de Física, Universidad Técnica Federico Santa María, Valparaíso, Chile33aInstitute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
33bDepartment of Modern Physics, University of Science and Technology of China, Anhui, China33cDepartment of Physics, Nanjing University, Jiangsu, China33dSchool of Physics, Shandong University, Shandong, China
33eDepartment of Physics and Astronomy, Shanghai Key Laboratory for Particle Physics and Cosmology,Shanghai Jiao Tong University, Shanghai, China
33fPhysics Department, Tsinghua University, Beijing 100084, China34Laboratoire de Physique Corpusculaire, Clermont Université and Université Blaise Pascal and CNRS/IN2P3,
Clermont-Ferrand, France35Nevis Laboratory, Columbia University, Irvington, New York, USA
36Niels Bohr Institute, University of Copenhagen, Kobenhavn, Denmark
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-25
37aINFN Gruppo Collegato di Cosenza, Laboratori Nazionali di Frascati, Frascati, Italy37bDipartimento di Fisica, Università della Calabria, Rende, Italy
38aAGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland38bMarian Smoluchowski Institute of Physics, Jagiellonian University, Krakow, Poland
39Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland40Physics Department, Southern Methodist University, Dallas, Texas, USA
41Physics Department, University of Texas at Dallas, Richardson, Texas, USA42DESY, Hamburg and Zeuthen, Germany
43Institut für Experimentelle Physik IV, Technische Universität Dortmund, Dortmund, Germany44Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden, Germany
45Department of Physics, Duke University, Durham, North Carolina, USA46SUPA-School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
47INFN Laboratori Nazionali di Frascati, Frascati, Italy48Fakultät für Mathematik und Physik, Albert-Ludwigs-Universität, Freiburg, Germany
49Section de Physique, Université de Genève, Geneva, Switzerland50aINFN Sezione di Genova, Genova, Italy
50bDipartimento di Fisica, Università di Genova, Genova, Italy51aE. Andronikashvili Institute of Physics, Iv. Javakhishvili Tbilisi State University, Tbilisi, Georgia
51bHigh Energy Physics Institute, Tbilisi State University, Tbilisi, Georgia52II Physikalisches Institut, Justus-Liebig-Universität Giessen, Giessen, Germany
53SUPA-School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom54II Physikalisches Institut, Georg-August-Universität, Göttingen, Germany
55Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France56Department of Physics, Hampton University, Hampton, Virginia, USA
57Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, Massachusetts, USA58aKirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
58bPhysikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany58cZITI Institut für technische Informatik, Ruprecht-Karls-Universität Heidelberg, Mannheim, Germany
59Faculty of Applied Information Science, Hiroshima Institute of Technology, Hiroshima, Japan60aDepartment of Physics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
60bDepartment of Physics, The University of Hong Kong, Hong Kong, China60cDepartment of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
61Department of Physics, Indiana University, Bloomington, Indiana, USA62Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität, Innsbruck, Austria
63University of Iowa, Iowa City, Iowa, USA64Department of Physics and Astronomy, Iowa State University, Ames, Iowa, USA
65Joint Institute for Nuclear Research, JINR Dubna, Dubna, Russia66KEK, High Energy Accelerator Research Organization, Tsukuba, Japan
67Graduate School of Science, Kobe University, Kobe, Japan68Faculty of Science, Kyoto University, Kyoto, Japan
69Kyoto University of Education, Kyoto, Japan70Department of Physics, Kyushu University, Fukuoka, Japan
71Instituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, Argentina72Physics Department, Lancaster University, Lancaster, United Kingdom
73aINFN Sezione di Lecce, Lecce, Italy73bDipartimento di Matematica e Fisica, Università del Salento, Lecce, Italy
74Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom75Department of Physics, Jožef Stefan Institute and University of Ljubljana, Ljubljana, Slovenia
76School of Physics and Astronomy, Queen Mary University of London, London, United Kingdom77Department of Physics, Royal Holloway University of London, Surrey, United Kingdom
78Department of Physics and Astronomy, University College London, London, United Kingdom79Louisiana Tech University, Ruston, Louisiana, USA
80Laboratoire de Physique Nucléaire et de Hautes Energies, UPMC and Université Paris-Diderot and CNRS/IN2P3, Paris, France81Fysiska institutionen, Lunds universitet, Lund, Sweden
82Departamento de Fisica Teorica C-15, Universidad Autonoma de Madrid, Madrid, Spain83Institut für Physik, Universität Mainz, Mainz, Germany
84School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom85CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France
86Department of Physics, University of Massachusetts, Amherst, Massachusetts, USA87Department of Physics, McGill University, Montreal, Quebec, Canada
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191803-26
88School of Physics, University of Melbourne, Victoria, Australia89Department of Physics, The University of Michigan, Ann Arbor, Michigan, USA
90Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan, USA91aINFN Sezione di Milano, Milano, Italy
91bDipartimento di Fisica, Università di Milano, Milano, Italy92B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, Republic of Belarus
93National Scientific and Educational Centre for Particle and High Energy Physics, Minsk, Republic of Belarus94Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
95Group of Particle Physics, University of Montreal, Montreal, Quebec, Canada96P.N. Lebedev Institute of Physics, Academy of Sciences, Moscow, Russia
97Institute for Theoretical and Experimental Physics (ITEP), Moscow, Russia98National Research Nuclear University MEPhI, Moscow, Russia
99D.V. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, Moscow, Russia100Fakultät für Physik, Ludwig-Maximilians-Universität München, München, Germany101Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), München, Germany
102Nagasaki Institute of Applied Science, Nagasaki, Japan103Graduate School of Science and Kobayashi-Maskawa Institute, Nagoya University, Nagoya, Japan
104aINFN Sezione di Napoli, Napoli, Italy104bDipartimento di Fisica, Università di Napoli, Napoli, Italy
105Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico, USA106Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen/Nikhef, Nijmegen, Netherlands
107Nikhef National Institute for Subatomic Physics and University of Amsterdam, Amsterdam, Netherlands108Department of Physics, Northern Illinois University, DeKalb, Illinois, USA
109Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, Russia110Department of Physics, New York University, New York, New York, USA
111The Ohio State University, Columbus, Ohio, USA112Faculty of Science, Okayama University, Okayama, Japan
113Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma, USA114Department of Physics, Oklahoma State University, Stillwater, Oklahoma, USA
115Palacký University, RCPTM, Olomouc, Czech Republic116Center for High Energy Physics, University of Oregon, Eugene, Oregon, USA
117LAL, Université Paris-Sud and CNRS/IN2P3, Orsay, France118Graduate School of Science, Osaka University, Osaka, Japan
119Department of Physics, University of Oslo, Oslo, Norway120Department of Physics, Oxford University, Oxford, United Kingdom
121aINFN Sezione di Pavia, Pavia, Italy121bDipartimento di Fisica, Università di Pavia, Pavia, Italy
122Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania, USA123National Research Centre “Kurchatov Institute” B.P.Konstantinov Petersburg Nuclear Physics Institute, St. Petersburg, Russia
124aINFN Sezione di Pisa, Pisa, Italy124bDipartimento di Fisica E. Fermi, Università di Pisa, Pisa, Italy
125Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania, USA126aLaboratorio de Instrumentacao e Fisica Experimental de Particulas-LIP, Lisboa, Portugal
126bFaculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal126cDepartment of Physics, University of Coimbra, Coimbra, Portugal
126dCentro de Física Nuclear da Universidade de Lisboa, Lisboa, Portugal126eDepartamento de Fisica, Universidade do Minho, Braga, Portugal
126fDepartamento de Fisica Teorica y del Cosmos and CAFPE, Universidad de Granada, Granada (Spain), Portugal126gDep Fisica and CEFITEC of Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
127Institute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech Republic128Czech Technical University in Prague, Praha, Czech Republic
129Faculty of Mathematics and Physics, Charles University in Prague, Praha, Czech Republic130State Research Center Institute for High Energy Physics, Protvino, Russia
131Particle Physics Department, Rutherford Appleton Laboratory, Didcot, United Kingdom132aINFN Sezione di Roma, Roma, Italy
132bDipartimento di Fisica, Sapienza Università di Roma, Roma, Italy133aINFN Sezione di Roma Tor Vergata, Roma, Italy
133bDipartimento di Fisica, Università di Roma Tor Vergata, Roma, Italy134aINFN Sezione di Roma Tre, Roma, Italy
134bDipartimento di Matematica e Fisica, Università Roma Tre, Roma, Italy
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191803-27
135aFaculté des Sciences Ain Chock, Réseau Universitaire de Physique des Hautes Energies-Université Hassan II,Casablanca, Morocco
135bCentre National de l’Energie des Sciences Techniques Nucleaires, Rabat, Morocco135cFaculté des Sciences Semlalia, Université Cadi Ayyad, LPHEA-Marrakech, Morocco135dFaculté des Sciences, Université Mohamed Premier and LPTPM, Oujda, Morocco
135eFaculté des sciences, Université Mohammed V-Agdal, Rabat, Morocco136DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers), CEA Saclay (Commissariat à l’Energie Atomique et
aux Energies Alternatives), Gif-sur-Yvette, France137Santa Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz, California, USA
138Department of Physics, University of Washington, Seattle, Washington, USA139Department of Physics and Astronomy, University of Sheffield, Sheffield, United Kingdom
140Department of Physics, Shinshu University, Nagano, Japan141Fachbereich Physik, Universität Siegen, Siegen, Germany
142Department of Physics, Simon Fraser University, Burnaby, British Columbia, Canada143SLAC National Accelerator Laboratory, Stanford, California, USA
144aFaculty of Mathematics, Physics & Informatics, Comenius University, Bratislava, Slovak Republic144bDepartment of Subnuclear Physics, Institute of Experimental Physics of the Slovak Academy of Sciences, Kosice, Slovak Republic
145aDepartment of Physics, University of Cape Town, Cape Town, South Africa145bDepartment of Physics, University of Johannesburg, Johannesburg, South Africa145cSchool of Physics, University of the Witwatersrand, Johannesburg, South Africa
146aDepartment of Physics, Stockholm University, Sweden146bThe Oskar Klein Centre, Stockholm, Sweden
147Physics Department, Royal Institute of Technology, Stockholm, Sweden148Departments of Physics & Astronomy and Chemistry, Stony Brook University, Stony Brook, New York, USA
149Department of Physics and Astronomy, University of Sussex, Brighton, United Kingdom150School of Physics, University of Sydney, Sydney, Australia
151Institute of Physics, Academia Sinica, Taipei, Taiwan152Department of Physics, Technion: Israel Institute of Technology, Haifa, Israel
153Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel154Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece
155International Center for Elementary Particle Physics and Department of Physics, The University of Tokyo, Tokyo, Japan156Graduate School of Science and Technology, Tokyo Metropolitan University, Tokyo, Japan
157Department of Physics, Tokyo Institute of Technology, Tokyo, Japan158Department of Physics, University of Toronto, Toronto, Ontario, Canada
159aTRIUMF, Vancouver, British Columbia, Canada159bDepartment of Physics and Astronomy, York University, Toronto, Ontario, Canada
160Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan161Department of Physics and Astronomy, Tufts University, Medford, Massachusetts, USA
162Centro de Investigaciones, Universidad Antonio Narino, Bogota, Colombia163Department of Physics and Astronomy, University of California Irvine, Irvine, California, USA
164aINFN Gruppo Collegato di Udine, Sezione di Trieste, Udine, Italy164bICTP, Trieste, Italy
164cDipartimento di Chimica, Fisica e Ambiente, Università di Udine, Udine, Italy165Department of Physics, University of Illinois, Urbana, Illinois, USA
166Department of Physics and Astronomy, University of Uppsala, Uppsala, Sweden167Instituto de Física Corpuscular (IFIC) and Departamento de Física Atómica, Molecular y Nuclear and Departamento de Ingeniería
Electrónica and Instituto de Microelectrónica de Barcelona (IMB-CNM), University of Valencia and CSIC, Valencia, Spain168Department of Physics, University of British Columbia, Vancouver, British Columbia, Canada
169Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia, Canada170Department of Physics, University of Warwick, Coventry, United Kingdom
171Waseda University, Tokyo, Japan172Department of Particle Physics, The Weizmann Institute of Science, Rehovot, Israel
173Department of Physics, University of Wisconsin, Madison, Wisconsin, USA174Fakultät für Physik und Astronomie, Julius-Maximilians-Universität, Würzburg, Germany
175Fachbereich C Physik, Bergische Universität Wuppertal, Wuppertal, Germany176Department of Physics, Yale University, New Haven, Connecticut, USA
177Yerevan Physics Institute, Yerevan, Armenia178Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules (IN2P3), Villeurbanne, France
179Yerevan Physics Institute, Yerevan, Armenia180Institut für Hochenergiephysik der OeAW, Wien, Austria
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-28
181National Centre for Particle and High Energy Physics, Minsk, Belarus182Universiteit Antwerpen, Antwerpen, Belgium183Vrije Universiteit Brussel, Brussel, Belgium
184Université Libre de Bruxelles, Bruxelles, Belgium185Ghent University, Ghent, Belgium
186Université Catholique de Louvain, Louvain-la-Neuve, Belgium187Université de Mons, Mons, Belgium
188Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil189Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
190aUniversidade Estadual Paulista, São Paulo, Brazil190bUniversidade Federal do ABC, São Paulo, Brazil
191Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria192University of Sofia, Sofia, Bulgaria
193Institute of High Energy Physics, Beijing, China194State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China
195Universidad de Los Andes, Bogota, Colombia196University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia
197University of Split, Faculty of Science, Split, Croatia198Institute Rudjer Boskovic, Zagreb, Croatia
199University of Cyprus, Nicosia, Cyprus200Charles University, Prague, Czech Republic
201Academy of Scientific Research and Technology of the Arab Republic of Egypt,Egyptian Network of High Energy Physics, Cairo, Egypt
202National Institute of Chemical Physics and Biophysics, Tallinn, Estonia203Department of Physics, University of Helsinki, Helsinki, Finland
204Helsinki Institute of Physics, Helsinki, Finland205Lappeenranta University of Technology, Lappeenranta, Finland
206DSM/IRFU, CEA/Saclay, Gif-sur-Yvette, France207Laboratoire Leprince-Ringuet, Ecole Polytechnique, IN2P3-CNRS, Palaiseau, France
208Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Université de Haute Alsace Mulhouse,CNRS/IN2P3, Strasbourg, France
209Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France210Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France
211Institute of High Energy Physics and Informatization, Tbilisi State University, Tbilisi, Georgia212RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany
213RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany214RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany
215Deutsches Elektronen-Synchrotron, Hamburg, Germany216University of Hamburg, Hamburg, Germany
217Institut für Experimentelle Kernphysik, Karlsruhe, Germany218Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece
219University of Athens, Athens, Greece220University of Ioánnina, Ioánnina, Greece
221Wigner Research Centre for Physics, Budapest, Hungary222Institute of Nuclear Research ATOMKI, Debrecen, Hungary
223University of Debrecen, Debrecen, Hungary224National Institute of Science Education and Research, Bhubaneswar, India
225Panjab University, Chandigarh, India226University of Delhi, Delhi, India
227Saha Institute of Nuclear Physics, Kolkata, India228Bhabha Atomic Research Centre, Mumbai, India
229Tata Institute of Fundamental Research, Mumbai, India230Indian Institute of Science Education and Research (IISER), Pune, India
231Institute for Research in Fundamental Sciences (IPM), Tehran, Iran232University College Dublin, Dublin, Ireland
233aINFN Sezione di Bari, Bari, Italy233bUniversità di Bari, Bari, Italy233cPolitecnico di Bari, Bari, Italy
234aINFN Sezione di Bologna, Bologna, Italy234bUniversità di Bologna, Bologna, Italy
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-29
235aINFN Sezione di Catania, Catania, Italy235bUniversità di Catania, Catania, Italy
235cCSFNSM, Catania, Italy236aINFN Sezione di Firenze, Firenze, Italy
236bUniversità di Firenze, Firenze, Italy237INFN Laboratori Nazionali di Frascati, Frascati, Italy
238aINFN Sezione di Genova, Genova, Italy238bUniversità di Genova, Genova, Italy
239aINFN Sezione di Milano-Bicocca, Milano, Italy239bUniversità di Milano-Bicocca, Milano, Italy
240aINFN Sezione di Napoli, Napoli, Italy240bUniversità di Napoli “Federico II,” Napoli, Italy
240cUniversità della Basilicata, Roma, Italy240dUniversità G. Marconi, Roma, Italy
241aINFN Sezione di Padova, Padova, Italy241bUniversità di Padova, Padova, Italy241cUniversità di Trento, Trento, Italy
242aINFN Sezione di Pavia, Pavia, Italy242bUniversità di Pavia, Pavia, Italy
243aINFN Sezione di Perugia, Perugia, Italy243bUniversità di Perugia, Perugia, Italy
244aINFN Sezione di Pisa, Pisa, Italy244bUniversità di Pisa, Pisa, Italy
244cScuola Normale Superiore di Pisa, Pisa, Italy245aINFN Sezione di Roma, Roma, Italy
245bUniversità di Roma, Roma, Italy246aINFN Sezione di Torino, Novara, Italy
246bUniversità di Torino, Novara, Italy246cUniversità del Piemonte Orientale, Novara, Italy
247aINFN Sezione di Trieste, Trieste, Italy247bUniversità di Trieste, Trieste, Italy
248Kangwon National University, Chunchon, Korea249Kyungpook National University, Daegu, Korea250Chonbuk National University, Jeonju, Korea
251Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea252Korea University, Seoul, Korea
253Seoul National University, Seoul, Korea254University of Seoul, Seoul, Korea
255Sungkyunkwan University, Suwon, Korea256Vilnius University, Vilnius, Lithuania
257National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia258Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico
259Universidad Iberoamericana, Mexico City, Mexico260Benemerita Universidad Autonoma de Puebla, Puebla, Mexico
261Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico262University of Auckland, Auckland, New Zealand
263University of Canterbury, Christchurch, New Zealand264National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan
265National Centre for Nuclear Research, Swierk, Poland266Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
267Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal268Joint Institute for Nuclear Research, Dubna, Russia
269Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia270Institute for Nuclear Research, Moscow, Russia
271Institute for Theoretical and Experimental Physics, Moscow, Russia272P.N. Lebedev Physical Institute, Moscow, Russia
273Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia274State Research Center of Russian Federation, Institute for High Energy Physics, Protvino, Russia
275University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia276Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-30
277Universidad Autónoma de Madrid, Madrid, Spain278Universidad de Oviedo, Oviedo, Spain
279Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain280CERN, European Organization for Nuclear Research, Geneva, Switzerland
281Paul Scherrer Institut, Villigen, Switzerland282Institute for Particle Physics, ETH Zurich, Zurich, Switzerland
283Universität Zürich, Zurich, Switzerland284National Central University, Chung-Li, Taiwan
285National Taiwan University (NTU), Taipei, Taiwan286Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand
287Cukurova University, Adana, Turkey288Middle East Technical University, Physics Department, Ankara, Turkey
289Bogazici University, Istanbul, Turkey290Istanbul Technical University, Istanbul, Turkey
291Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov, Ukraine292National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine
293University of Bristol, Bristol, United Kingdom294Rutherford Appleton Laboratory, Didcot, United Kingdom
295Imperial College, London, United Kingdom296Brunel University, Uxbridge, United Kingdom
297Baylor University, Waco, Texas, USA298The University of Alabama, Tuscaloosa, Alabama, USA
299Boston University, Boston, Massachusetts, USA300Brown University, Providence, Rhode Island, USA
301University of California, Davis, Davis, California, USA302University of California, Los Angeles, Los Angeles, California, USA
303University of California, Riverside, Riverside, California, USA304University of California, San Diego, La Jolla, California, USA
305University of California, Santa Barbara, Santa Barbara, California, USA306California Institute of Technology, Pasadena, California, USA307Carnegie Mellon University, Pittsburgh, Pennsylvania, USA308University of Colorado at Boulder, Boulder, Colorado, USA
309Cornell University, Ithaca, New York, USA310Fermi National Accelerator Laboratory, Batavia, Illinois, USA
311University of Florida, Gainesville, Florida, USA312Florida International University, Miami, Florida, USA313Florida State University, Tallahassee, Florida, USA
314Florida Institute of Technology, Melbourne, Florida, USA315University of Illinois at Chicago (UIC), Chicago, Illinois, USA
316The University of Iowa, Iowa City, Iowa, USA317Johns Hopkins University, Baltimore, Maryland, USA318The University of Kansas, Lawrence, Kansas, USA319Kansas State University, Manhattan, Kansas, USA
320Lawrence Livermore National Laboratory, Livermore, California, USA321University of Maryland, College Park, Maryland, USA
322Massachusetts Institute of Technology, Cambridge, Massachusetts, USA323University of Minnesota, Minneapolis, Minnesota, USA
324University of Mississippi, Oxford, Mississippi, USA325University of Nebraska-Lincoln, Lincoln, Nebraska, USA
326State University of New York at Buffalo, Buffalo, New York, USA327Northeastern University, Boston, Massachusetts, USA
328Northwestern University, Evanston, Illinois, USA329University of Notre Dame, Notre Dame, Indiana, USA
330The Ohio State University, Columbus, Ohio, USA331Princeton University, Princeton, New Jersey, USA332Purdue University, West Lafayette, Indiana, USA
333Purdue University Calumet, Hammond, Indiana, USA334Rice University, Houston, Texas, USA
335University of Rochester, Rochester, New York, USA336The Rockefeller University, New York, New York, USA
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-31
337Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA338University of Tennessee, Knoxville, Tennessee, USA
339Texas A&M University, College Station, Maryland, USA340Texas Tech University, Lubbock, Texas, USA
341Vanderbilt University, Nashville, Tennessee, USA342University of Virginia, Charlottesville, Virginia, USA
343Wayne State University, Detroit, Michigan, USA344University of Wisconsin, Madison, Wisconsin, USA
aDeceased.bAlso at Department of Physics, King’s College London, London, United Kingdom.cAlso at Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan.dAlso at Novosibirsk State University, Novosibirsk, Russia.eAlso at TRIUMF, Vancouver, BC, Canada.fAlso at Department of Physics, California State University, Fresno, CA, USA.gAlso at Department of Physics, University of Fribourg, Fribourg, Switzerland.hAlso at Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Portugal.iAlso at Tomsk State University, Tomsk, Russia.jAlso at CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France.kAlso at Università di Napoli Parthenope, Napoli, Italy.lAlso at Institute of Particle Physics (IPP), Canada.
mAlso at Particle Physics Department, Rutherford Appleton Laboratory, Didcot, United Kingdom.nAlso at Department of Physics, St. Petersburg State Polytechnical University, St. Petersburg, Russia.oAlso at Louisiana Tech University, Ruston, LA, USA.pAlso at Institucio Catalana de Recerca i Estudis Avancats, ICREA, Barcelona, Spain.qAlso at Department of Physics, National Tsing Hua University, Taiwan.rAlso at Department of Physics, The University of Texas at Austin, Austin, TX, USA.sAlso at Institute of Theoretical Physics, Ilia State University, Tbilisi, Georgia.tAlso at CERN, Geneva, Switzerland.uAlso at Georgian Technical University (GTU),Tbilisi, Georgia.vAlso at Ochadai Academic Production, Ochanomizu University, Tokyo, Japan.wAlso at Manhattan College, New York, NY, USA.xAlso at Institute of Physics, Academia Sinica, Taipei, Taiwan.yAlso at LAL, Université Paris-Sud and CNRS/IN2P3, Orsay, France.zAlso at Academia Sinica Grid Computing, Institute of Physics, Academia Sinica, Taipei, Taiwan.aaAlso at School of Physics, Shandong University, Shandong, China.bbAlso at Moscow Institute of Physics and Technology State University, Dolgoprudny, Russia.ccAlso at Section de Physique, Université de Genève, Geneva, Switzerland.ddAlso at International School for Advanced Studies (SISSA), Trieste, Italy.eeAlso at Department of Physics and Astronomy, University of South Carolina, Columbia, SC, USA.ffAlso at School of Physics and Engineering, Sun Yat-sen University, Guangzhou, China.ggAlso at Faculty of Physics, M.V.Lomonosov Moscow State University, Moscow, Russia.hhAlso at National Research Nuclear University MEPhI, Moscow, Russia.iiAlso at Department of Physics, Stanford University, Stanford, CA, USA.jjAlso at Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Budapest, Hungary.kkAlso at Department of Physics, The University of Michigan, Ann Arbor, MI, USA.llAlso at Discipline of Physics, University of KwaZulu-Natal, Durban, South Africa.
mmAlso at University of Malaya, Department of Physics, Kuala Lumpur, Malaysia.nnAlso at Vienna University of Technology, Vienna, Austria.ooAlso at CERN, European Organization for Nuclear Research, Geneva, Switzerland.ppAlso at State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China.qqAlso at Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Université de Haute Alsace Mulhouse, CNRS/IN2P3,Strasbourg, France.rrAlso at National Institute of Chemical Physics and Biophysics, Tallinn, Estonia.ssAlso at Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia.ttAlso at Universidade Estadual de Campinas, Campinas, Brazil.uuAlso at Centre National de la Recherche Scientifique (CNRS)–IN2P3, Paris, France.vvAlso at Laboratoire Leprince-Ringuet, Ecole Polytechnique, IN2P3–CNRS, Palaiseau, France.wwAlso at Joint Institute for Nuclear Research, Dubna, Russia.xxAlso at Ain Shams University, Cairo, Egypt.
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-32
yyAlso at British University in Egypt, Cairo, Egypt.zzAlso at Helwan University, Cairo, Egypt.aaaAlso at Suez University, Suez, Egypt.bbbAlso at Cairo University, Cairo, Egypt.cccAlso at Fayoum University, El-Fayoum, Egypt.dddAlso at Université de Haute Alsace, Mulhouse, France.eeeAlso at Brandenburg University of Technology, Cottbus, Germany.fffAlso at Institute of Nuclear Research ATOMKI, Debrecen, Hungary.
gggAlso at Eötvös Loránd University, Budapest, Hungary.hhhAlso at University of Debrecen, Debrecen, Hungary.iiiAlso at Wigner Research Centre for Physics, Budapest, Hungary.jjjAlso at University of Visva-Bharati, Santiniketan, India.
kkkAlso at King Abdulaziz University, Jeddah, Saudi Arabia.lllAlso at University of Ruhuna, Matara, Sri Lanka.
mmmAlso at Isfahan University of Technology, Isfahan, Iran.nnnAlso at University of Tehran, Department of Engineering Science, Tehran, Iran.oooAlso at Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran.pppAlso at Università degli Studi di Siena, Siena, Italy.qqqAlso at Purdue University, West Lafayette, IN, USA.rrrAlso at International Islamic University of Malaysia, Kuala Lumpur, Malaysia.sssAlso at Consejo National de Ciencia y Tecnologia, Mexico, Mexico.tttAlso at Institute for Nuclear Research, Moscow, Russia.
uuuAlso at Institute of High Energy Physics and Informatization, Tbilisi State University, Tbilisi, Georgia.vvvAlso at St. Petersburg State Polytechnical University, St. Petersburg, Russia.
wwwAlso at National Research Nuclear University ’Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia.xxxAlso at California Institute of Technology, Pasadena, CA, USA.yyyAlso at Faculty of Physics, University of Belgrade, Belgrade, Serbia.zzzAlso at Facoltà Ingegneria, Università di Roma, Roma, Italy.aaaaAlso at National Technical University of Athens, Athens, Greece.bbbbAlso at Scuola Normale e Sezione dell’INFN, Pisa, Italy.ccccAlso at University of Athens, Athens, Greece.ddddAlso at Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland.eeeeAlso at Institute for Theoretical and Experimental Physics, Moscow, Russia.ffffAlso at Albert Einstein Center for Fundamental Physics, Bern, Switzerland.
ggggAlso at Adiyaman University, Adiyaman, Turkey.hhhhAlso at Mersin University, Mersin, Turkey.iiiiAlso at Cag University, Mersin, Turkey.jjjjAlso at Piri Reis University, Istanbul, Turkey.
kkkkAlso at Gaziosmanpasa University, Tokat, Turkey.llllAlso at Ozyegin University, Istanbul, Turkey.
mmmmAlso at Izmir Institute of Technology, Izmir, Turkey.nnnnAlso at Mimar Sinan University, Istanbul, Istanbul, Turkey.ooooAlso at Marmara University, Istanbul, Turkey.ppppAlso at Kafkas University, Kars, Turkey.qqqqAlso at Yildiz Technical University, Istanbul, Turkey.rrrrAlso at Hacettepe University, Ankara, Turkey.ssssAlso at Rutherford Appleton Laboratory, Didcot, United Kingdom.ttttAlso at School of Physics and Astronomy, University of Southampton, Southampton, United Kingdom.
uuuuAlso at Instituto de Astrofísica de Canarias, La Laguna, Spain.vvvvAlso at Utah Valley University, Orem, UT, USA.
wwwwAlso at University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia.xxxxAlso at Argonne National Laboratory, Argonne, IL, USA.yyyyAlso at Erzincan University, Erzincan, Turkey.zzzzAlso at Texas A&M University at Qatar, Doha, Qatar.aaaaaAlso at Kyungpook National University, Daegu, Korea.
PRL 114, 191803 (2015) P HY S I CA L R EV I EW LE T T ER S week ending15 MAY 2015
191803-33
Fragile Families Challenge
A mass collaboration combining predictive modeling, causalinference, and qualitative interviews to improve the lives ofdisadvantaged children in the US.
By working together we can do (provably) better than any of uscan do individually.
Fragile Families Challenge
A mass collaboration combining predictive modeling, causalinference, and qualitative interviews to improve the lives ofdisadvantaged children in the US.
By working together we can do (provably) better than any of uscan do individually.
Fragile Families Challenge will help:
I prioritize issues for randomized controlled trials
I find “dark matter”
I change the way that social science happens
Fragile Families Challenge will help:
I prioritize issues for randomized controlled trials
I find “dark matter”
I change the way that social science happens
Fragile Families Challenge will help:
I prioritize issues for randomized controlled trials
I find “dark matter”
I change the way that social science happens
I Birth cohort panel study
I ≈ 5,000 children born in 20 U.S. cities
I Followed from birth through age 15
Fragile Families Challenge:
1. common task method (e.g., Netflix Prize)
2. use submissions to do cool stuff
Fragile Families Challenge:
1. common task method (e.g., Netflix Prize)
2. use submissions to do cool stuff
1. standard common task method (e.g., Netflix Prize)
2. use submissions to do cool stuff
Use community model to
I prioritize issues for randomized controlled trials
I look for “dark matter”
Use community model to
I prioritize issues for randomized controlled trials
I look for “dark matter”
Causal inference from observational data:
I Perfectly match two kids who are identical except whetherthey were evicted or not
I Propensity score matching (roughly, one dimensionalmatching)
I Community model produces propensity scores used formatching
Causal inference from observational data:
I Perfectly match two kids who are identical except whetherthey were evicted or not
I Propensity score matching (roughly, one dimensionalmatching)
I Community model produces propensity scores used formatching
Causal inference from observational data:
I Perfectly match two kids who are identical except whetherthey were evicted or not
I Propensity score matching (roughly, one dimensionalmatching)
I Community model produces propensity scores used formatching
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0 1 2 3 4 5Income / poverty line
Num
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of c
hild
ren
● Observed eviction
0.05
0.10
0.15
P(Evicted)
Eviction DGP
pi = logit−1
(−Income +
Number of kids
2− 3.5
)Evictedi ∼ Bernoulli(pi )
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ren
● Observed eviction
0.05
0.10
0.15
P(Evicted)
Eviction DGP
pi = logit−1
(−Income +
Number of kids
2− 3.5
)Evictedi ∼ Bernoulli(pi )
I A social scientist submits a logistic regression
logit−1(pi ) = β0 +
Not in DGP︷ ︸︸ ︷β1(Race)i + β2(Sex)i +
In true DGP︷ ︸︸ ︷β3(Income)i
I A data scientist submits a random forest
pi = f (
Not in DGP︷ ︸︸ ︷Race, Sex,
In DGP︷ ︸︸ ︷Number of children)
I A famous professor uses a new measure of “cultural capital”
pi = logit−1β0 +
Not in DGP︷ ︸︸ ︷β1(Race) + β2(Sex) + β3(Cultural capital)
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0.00 0.05 0.10 0.15True P(Eviction)
Mod
eled
P(E
vict
ion)
Logit, Brier = 0.0346
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0.00
0.05
0.10
0.15
0.00 0.05 0.10 0.15True P(Eviction)
Mod
eled
P(E
vict
ion)
RF, Brier = 0.035
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0.00
0.05
0.10
0.15
0.00 0.05 0.10 0.15True P(Eviction)
Mod
eled
P(E
vict
ion)
Culture, Brier = 0.0355
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0.00
0.05
0.10
0.15
0.00 0.05 0.10 0.15True P(Eviction)
Mod
eled
P(E
vict
ion)
SL, Brier = 0.0345
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Logit, Brier = 0.0346 RF, Brier = 0.035
Culture, Brier = 0.0355 SL, Brier = 0.0345
0.00
0.05
0.10
0.15
0.00
0.05
0.10
0.15
0.00 0.05 0.10 0.15 0.00 0.05 0.10 0.15True P(Eviction)
Mod
eled
P(E
vict
ion)
With community propensity score we can:
I use propensity score matching to estimate the effect ofeviction on outcomes collected in future waves
Use community model to
I prioritize issues for randomized controlled trials
I look for “dark matter”
Use community model to
I prioritize issues for randomized controlled trials
I look for “dark matter”
Most social science models have poor predictive performance andmost social scientists don’t care
Y vs β
Why do social science models have such poor predictiveperformance?
I poor measurement
I “dark matter”
Why do social science models have such poor predictiveperformance?
I poor measurement
I “dark matter”
Why do social science models have such poor predictiveperformance?
I poor measurement
I “dark matter”
Grade point average (GPA)
Assumed data generating process: kids have high GPA if
I High vocabulary skills at school entry
I Low material hardship at school entry
I Low behavior problems
Assumed data generating process: kids have high GPA if
I High vocabulary skills at school entry
I Low material hardship at school entry
I Low behavior problems
Signal = 1 + 3× logit−1([Vocabulary score at 5]
− 3× [Material hardship at 5]
− [Behavior problems at 9]
+ 2)
Noise ∼ Beta(α = 5, β = 5)× 2×min(Signal− 1, 4− Signal)
But imagine material hardship is unmeasured!
I A social scientist submits an OLS model
Yi = β0 +
Not in true DGP︷ ︸︸ ︷β1(Race)i + β2(Sex)i
+ γ
(Race)i × (Sex)i ×
Variable in true DGP︷ ︸︸ ︷{Vocab,Vocab2,Vocab3}i
I A data scientist submits a random forest
Yi = f (
Not in true DGP︷ ︸︸ ︷Race, Sex ,
Variable in true DGP︷ ︸︸ ︷Behavior problems)
I A famous professor uses a new measure of “cultural capital”
Yi = β0 +
Not in true DGP︷ ︸︸ ︷β1(Race) + β2(Sex) + β3(Cultural capital)
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1
2
3
4
1 2 3 4True signal
Pre
dict
ed G
PA a
t age
15
OLS model with interactions: MSE = 0.307
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1
2
3
4
1 2 3 4True signal
Pre
dict
ed G
PA a
t age
15
Random forest: MSE = 0.443
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1
2
3
4
1 2 3 4True signal
Pre
dict
ed G
PA a
t age
15
OLS culture model: MSE = 0.621
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2
3
4
1 2 3 4True signal
Pre
dict
ed G
PA a
t age
15
Super Learner: MSE = 0.257
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OLS fit: MSE = 0.307 RF fit: MSE = 0.443
Culture fit: MSE = 0.621 SL fit: MSE = 0.257
1
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1 2 3 4 1 2 3 4Truth
Pre
dict
ions
Fit of submitted models
OLS fit: MSE = 0.307 RF fit: MSE = 0.443
Culture fit: MSE = 0.621 SL fit: MSE = 0.257
0
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60
0
20
40
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−2 −1 0 1 −2 −1 0 1Model residual
Fre
quen
cy
Unusually low residual Typical residual Unusually high residual
Choosing kids to interview
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Culture fit, Cor = −0.35 OLS fit, Cor = −0.44
RF fit, Cor = −0.4 SL fit, Cor = −0.5
0.0
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0.6
0.0
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−2 −1 0 1 −2 −1 0 1
Model residual
Mat
eria
l har
dshi
p (u
nobs
erve
d)
● ● ●Unusually low residual Typical residual Unusually high residual
Learning from outliers
Use community model to
I prioritize issues for randomized controlled trials
I look for “dark matter”
Results from a mini pilot test
I undergraduates, graduate students, and faculty at Princeton
I about 4 hours to make a simple submission
I 11 submissions received
I undergraduates, graduate students, and faculty at Princeton
I about 4 hours to make a simple submission
I 11 submissions received
I undergraduates, graduate students, and faculty at Princeton
I about 4 hours to make a simple submission
I 11 submissions received
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StackedMSE = 0.062
SubmissionMSE = 0.066
SubmissionMSE = 0.067
SubmissionMSE = 0.067
SubmissionMSE = 0.072
SubmissionMSE = 0.073
SubmissionMSE = 0.076
SubmissionMSE = 0.081
SubmissionMSE = 0.085
SubmissionMSE = 0.087
SubmissionMSE = 0.112
SubmissionMSE = 0.191
True latent ''grittiness''
Pre
dict
ed g
rit a
t age
15
Grit: Do we recover the signal?
Mini pilot test suggests that this is possible
Fragile Families Challenge:
1. common task method (e.g., Netflix Prize)
2. use submissions to do cool stuff
vsPrediction Information
vsPrediction Information
1. common task method (e.g., Netflix Prize)
2. use submissions to do cool stuff
Fragile Families Challenge
Want to participate?
Fragile Families Challenge
Want to participate?
Four main research designs:
I Observing behavior
I Asking questions
I Running experiments
I Creating mass collaboration
+Readymades Custommades
https://commons.wikimedia.org/wiki/File:Duchamp_Fountaine.jpghttps://commons.wikimedia.org/wiki/File:%27David%27_by_Michelangelo_JBU0001.JPG
Ethics
With great power there must also come
great responsibility
Amazing Fantasy #15, “Spider-Man!”, Writer: Stan Lee, Illustrator: Steve Ditko, 1962
With great power there must also come
great responsibility
Amazing Fantasy #15, “Spider-Man!”, Writer: Stan Lee, Illustrator: Steve Ditko, 1962
Bit by Bit:Social Research in the Digital Age
Social Scientists ←→ Data Scientists
Read & Participate in Open Review: www.bitbybitbook.com
http://www.openreviewtoolkit.org
Bit by Bit:Social Research in the Digital Age
Social Scientists ←→ Data Scientists
Read & Participate in Open Review:http://www.bitbybitbook.com