BaBar summer success

BaBar summer success

Riccardo FacciniUniversita’ “La Sapienza” and INFN RomeBaBar Collaboration MeetingSLAC Sep 12th 2006

Overall contribution to ICHEP 114 Contributed papers

cfr 69 in 2005 and 72 in 2004 70 submitted to journal Full listing (ordered by topic) in

http://www.slac.stanford.edu/BFROOT/www/Physics/Planning2006/ICHEP/ICHEP_pap.html

Two plenary talks 24 parallel talks in 6 different sessions All updates are on 345 fb-1 (315 onpeak)

Up to June 1st

Belle contributed only 28 papers

Publication History

Since Sep 1 2005:BaBar: 70Belle 28

Measurements of R=sigma_had/sigma_mumu 1 2 - - -

measurement of form factors 2 3 1 3 1

Probing strong interactions with the BaBar experiment 1 3 3 3

Quarkonium spectroscopy with the BaBar experiment 2 4 2 3 1

Study of recently observed mesonic Charm states and possible observation of new states 2 2 1 1

Observation of new baryonic Charm states 3 2 2 2

Study of Charmed Baryons with the BaBar experiment 2 3 - - -

Loose ends on heavy quark physics 4

Study of B decays to Open Charm final states 2 2 4 1 3 1

Study of the decays of Charm mesons 2 2 3 1

Study of two-body Charmless B decays 5 2 7 5

Study of multi-body Charmless B decays 1 2 4 2

Shape function from radiative B decays 3 2

b-->c lnu decays and measurement of Vcb 3 1 2

b-->ulnu decays and measurement of Vub 3 2 2

Measurements of Charmless hadronic BFs 3 0 2 3

Measurements of the CP angle alpha 4 0 3 2

Measurements of the CP angle gamma 1 1 7 0 0 1

Study of exclusive rad and ew penguin B decays 1 2 1 - - -

Search for mixing and CP violation in D decays 1 1 2

Measurement of the angle beta in Charmless B decays 7 0 6 7

Measurements of CP violation in B-->Charm decays 2 3 2 1 1

Search for leptonic B decays 3 2

Search for physics BSM in tau decays and production 1 0 3 1 2 3

total 31 40 66 33 19 16

BaBar BelleF P W F P WTalks

Content: a comparisonLegenda:

F: new on full stat P: new on partial stat W: already presented in winter ‘06

Same set of results on the very last chunk of data, but otherwise BaBar has >2 times more results

Note: both collaborations presented all results new since last round on summer conferences

Reader Digest of resultsRadiative B decays:

10 papers

Radiative B decays:10 papers

Charm(onium) prod and decay

13 papers


13 papers

B to charm decays:12 papers


CP Violation, :5 papers


Semileptonic B:10 papers


Charmless Hadronic B:19 papers


CP Violation :8 papers




Tau and low-energy:8 papers


Charm(onium) spectroscopy:

16 papers


16 papers

Courtesy of D. Lange

CP violation in B decaysRadiative B decays:

10 papers



13 papers


13 papers
















16 papers


16 papers

Reviewed in http://ichep06.jinr.ru/reports/2_hazumi_ichep2006.ppt and 3_10p20_Kowalewski.pdf

CP violation in Charmonium

sin2=0.710±0.034±0.0019(was 0.722±0.040)(Belle: 0.642±0.031±0.017)

=0.932±0.026±0.017(when floated on CP=-1 states)

Belle has only updated J/K0, still without publication

Repeated standard set of measurements 2.5 direct CP violation in CP=-1 modes

Combination with Belle

Measurements are consistent [2.1 in the case of CCP] and the averages consistent with the SM. Still to work to make the samples uniform (J/ K0 vs all modes)

bs penguins

Naïve average of all b s modes

sin2eff = 0.52 ± 0.052.6 deviation betweenpenguin and tree

(b s) (b c)

Naïve average of all b s modes

sin2eff = 0.52 ± 0.052.6 deviation betweenpenguin and tree

(b s) (b c)

Belle : 535M BB

BaBar: 347M BBBaBar still exploits its luminosity significantly better than Belle

Larger BaBar errors because of full Dalitz (see next slide)

4.9 from S=0

New result not yet in averages (more work needed)

BK+K-K0

75% of BKKK0 is not BKs Important to understand the underlying background and its

interference Full Dalitz analysis performed (with ,f0, and non

resonant component) Knowledge of strong phase allows to extract weak phases

without ambiguities Assuming SM (i.e. same weak phase for all final

states) =0.38±0.08 rad [SM=0.35] very good agreement with SM ambiguity on resolved at the 4 level (SM favored)

Twice more sensitive that Belle in BDh0

First ambiguity free measurement of in bs penguins

BKsKs

627.024.0

000

87

00

10)02.1()(

)5.7(32)(

KKB

KKNSS

640.035.0

000

9.10.2

7.77.6

00

10)13.019.1()(

)5.4( 0.23)(

KKB

KKNSS

Old Result:

40.039.0

00

8.07.0

00

39.0)(

4.1)(

SS

SS

KKC

KKS

First TD analysis in bd penguins

Measurement of

The error on from is dominated by the limit on

f

B0Significance 3.0 = [1.2 ± 0.4 (stat.) ± 0.3 (syst.)]x10-6 fL= 0.86+0.11-0.13 (stat.) ± 0.06 (syst.)

First evidence of B

Error on from 11o to 14o

Previous BaBar result: (0.5±0.4) 10-6

Belle never presented a resultHighly improved sensitivity

N00 = 98+32 ± 22−31

No news from Belle

Update on 2-body

00

N00 = 140 ± 25

CC0000 = = −0.33 −0.33 ±± 0.36 0.36 ±± 0.080.08

BrBr0000 = = (1.48 (1.48 ±± 0.26 0.26 ±± 0.12) 0.12)

1010−−66

B0 tags

B0 tags_

asymmetry

SS = = −0.53 −0.53 ±± 0.14 0.14 ±± 0.020.02

CC = = −0.16 −0.16 ±± 0.11 0.11 ±± 0.030.03

3.6 evidence of CPV

2.3 diff. btw. Belle and BaBar

(C = A)

Comparison with Belle’s

Interpreting B, B, and B results in terms of

CKM fitno in fit

169.7°

[164, 176]º at 68.3% C.L.

Measurement of Update of

BD0K [Dalitz]

B+

B-

B+

B-

BDK BD*K

DK(old) DK(new) D*K(old) D*K(new)

x- 0.08±0.07±0.03 0.041±0.059±0.018 -0.13±0.09±0.03 -0.106±0.091±0.020

y- 0.06±0.09±0.04 0.056±0.071±0.007 -0.14±0.11±0.02 -0.019±0.096±0.022

X+ -0.13±0.09±0.03 -0.072±0.056±0.014 0.14±0.09±0.03 0.084±0.088±0.015

Y+ 0.02±0.08±0.02 -0.033±0.066±0.007 0.01±0.12±0.04 0.096±0.111±0.032

Errors shrink (in particular systematics), but rB is smaller (x,y closer to 0) error on increases …

= 92 +/- 41 +/-10 +/- 16 (was 70+/-31+12-10+14-11 )

No update from Belle

Other B decaysRadiative B decays:

10 papers



13 papers


13 papers





Semileptonic and leptonic B:

12 papers

Semileptonic and leptonic B:

12 papers










16 papers


16 papers

Reviewed in http://ichep06.jinr.ru/reports/5_12p10_Barlow.ppt and 3_10p20_Kowalewski.pdf

bul exclusive: probing theory

New “loose cuts method”

4 more results on Vub and 2 on Vcb

Old technique, 80 fb-1

B We have our own observation of all modes (as opposed to only ) Central values in between ours past ones and Belle

BaBar ’06 315 fb-1

No update from Belle

B: a year of emotions

April: Belle announces at FPCP a >4 evidence for Btn

May-July: BaBar struggles to reproduce the accuracy of Belle (in an area where we were traditionally more advanced)

August: BaBar presents only one of the two

independent analyses while still investigating

Belle presents an errata of the efficiencies by a factor 2!!!! Significance down to 3.5, BF a factor 2

larger BaBar and Belle have similar accuracies

Soon: BaBar is ready to publish both analyses expect an error which is 40% smaller than Belle’s

BF(B++)

Non B physicsRadiative B decays:

10 papers



13 papers


13 papers
















16 papers


16 papers

Reviewed in http://ichep06.jinr.ru/reports/4_11p30_pakhlov.ppt

D mixing Two innovative results in multibody decays

K K

RM=(0.023+0.018-0.014)% RM=(0.019+0.016-0.015)%

CombinedRM=(0.020+0.011-0.010)%

No mixing possible @ 2.1% C.L.

Belle has another “2” effect in DK Close to observation?

More new statesConfirmation of Belle + better params

Xc’

c*

DsJ

First observation(in 3 states)

Y(2S)Inconsistent with Y(4260): yet another state?

Summary At ICHEP’06 BaBar has achieved record productivity, overwhelming the direct

competitor Congratulations to everybody!!!

In the topics where the luminosity matters the refined statistical analysis technique makes BaBar competitive even with 35% less luminosity (345 M BB/547 M BB)

Showed dominance in several areas such as: CPV in bs penguins

New modes Measurements related to

First observation of B Dalitz Time Dependent analyses

First full analysis of BKKK0 (including K0) D-mixing in multibody D decays

Innovative technique to exploit also these decay modes Leptonic B Decays

After Belle corrected a mistake in their efficiencies, we have a measurement of BF(B) with same accuracy as them and potentially 40% better by fall

semileptonic B decays, Charm and Charmonium spectroscopy, …

Full listing of conf paps (ordered by topic) inhttp://www.slac.stanford.edu/BFROOT/www/Physics/Planning2006/ICHEP/ICHEP_pap.html

Backup slides

Update of

S=-0.19±0.21 C=-0.07±0.15 eff=(96+7-6)o [was 100+10-7]

fL=0.977±0.024

A=-0.142+/-0.041+/-0.015S=0.01+/-0.12+/-0.03C=0.154+/-0.090+/-0.037

now was

A=-0.088+/-0.049+/-0.013S=-0.10+/-0.14+/-0.04C=0.34+/-0.11+/-0.05

Direct CPV now at 3 sigma

Impact on

Improvement in h, allow to almost exclude dips between the multiple solutions

Evolution of sin2 measurements

Present CKM

fit

Present WA

BABAR 0.722±0.040±0.023Belle 0.652±0.039±0.020

BaBar 2006: 0.710±0.034

Evolution of SK measurementsBABAR 0.50±0.25±0.07

Belle 0.44±0.27±0.05

BaBar 2006: 0.31±0.29

Dalitz analysis allows better understanding of interference of other modes

Summary Alpha

Evidence of spoils measurement of Error up to 20o

measurements redone with reduced errors 4 evidence of CP violation

Update on gamma rB getting further smaller increased error on

Beta Dalitz KKKs measurement Update on all bs penguin

H’Ks closer to SM Others mostly similar

Semileptonic Lot of input to reduction of theo errors

First evidence of the charged mode Our own observation of the neutral modes (half way wrt Belle)

Behind Belle found we have to improve quickly sensitivity

D mixing Two of the three most sensitive modes ready (the other one is coming) Still only at the 2 level

Progress on spectroscopy New puzzles

Documents

BaBar summer success