BSM at Colliders20161018-Gwangju... · 2017. 11. 26. · BSM at Colliders. Sho. IWAMOTO This 2-hour presentation is based on my works M. Endo, K. Hamaguchi, SI, N. Yokozaki, Higgs

BSM at Colliders

Sho IWAMOTO

This 2-hour presentation is based on my works

M. Endo, K. Hamaguchi, SI, N. Yokozaki, Higgs mass, muon g−2, and LHC prospects in gauge mediation models with vector-like matters [1112.5653]

M. Endo, K. Hamaguchi, SI, T. Yoshinaga, Muon g−2 vs LHC in Supersymmetric Models [1303.4256]

J. L. Feng, SI, Y. Shadmi, S. Tarem, Long-Lived Sleptons at the LHC and a 100 TeV Proton Collider [1505.02996]

M. Abdullah, J. L. Feng, SI, B. Lillard , Heavy Bino Dark Matter and Collider Signals in the MSSM with Vector-like 4th-Generation Particles [1608.00283]

and many works by others. Several citations could be missing; sorry for the incompleteness.

18‒19 Oct. 2016 “Search for New Physics through the Higgs boson” @ Gwangju

http://www.misho-web.com/

http://phsites.technion.ac.il/shadmi/

http://creativecommons.org/licenses/by-nc/4.0/




http://arxiv.org/abs/1112.5653




http://home.kias.re.kr/MKG/h/higgsboson/

http://www.holidayinngwangju.com/

BSM at Colliders?

2 /134

BSM at Colliders?

3 /134

BSM at Colliders?

4 /134

= our Universe

BSM at Colliders?

5 /134

= our Universe

dark matter?

BSM at Colliders?

6 /134

= our Universe

dark matter? dark energy?

BSM at Colliders?

7 /134

Many hints of BSM

Dark matter

Dark energy

Neutrino mass

Gauge coupling unification

Higgs mass (“naturalness”)

Muon “g−2”

…

BSM at Colliders?

8 /134

SUSY

composite Higgs

composite DM

extra dimensions

extended Higgs

…

Many hints of BSM

Dark matter

Dark energy

Neutrino mass



Muon “g−2”

…

SUSY

composite Higgs

composite DM

extra dimensions

extended Higgs

…

LHC

future pp collider

future ee collider

BSM at Colliders?

9 /134

SUSY

composite Higgs

composite DM

extra dimensions

extended Higgs

…

LHC

future pp collider

future ee collider

BSM at Colliders?

10 /134

SUSY

composite Higgs

composite DM

extra dimensions

extended Higgs

…

LHC

future pp collider

future ee collider

BSM at Colliders?

11 /134

“strange” signature ??

SUSY

composite Higgs

composite DM

extra dimensions

extended Higgs

…

LHC

future pp collider

future ee collider

BSM at Colliders?

12 /134

“strange” signature ??

high energy

high precision

[long-lived charged/colored particle]

new heavy particles

stable & neutral

stable & charged exotic tracks (LLCP)

unstable decay products

resonance

“more exotic” signatures

deviation in known parameters

Higgs-, top-, and EW-sectors.

13 /134

LHC

future pp collider

future ee collider

high energy

high precision

[long-lived charged/colored particle]

LHC

future pp collider

future ee collider

new heavy particles

stable & neutral

stable & charged exotic tracks (LLCP)

unstable decay products

resonance

“more exotic” signatures

deviation in known parameters

Higgs-, top-, and EW-sectors.

14 /134

LHC

FCC-pp 15 /134

SUSY

composite Higgs

composite DM

extra dimensions

extended Higgs

…

Dark matter

Dark energy

Neutrino mass



Muon “g−2”

…

resonances

LLCP

“more exotic”

LHC

FCC-pp 16 /134

SUSY

composite Higgs

composite DM

extra dimensions

extended Higgs

…

Dark matter

Dark energy

Neutrino mass



Muon “g−2”

…

resonances

LLCP

“more exotic”

hep-ex

LHC

FCC-pp 17 /134

SUSY

composite Higgs

composite DM

extra dimensions

extended Higgs

…

Dark matter

Dark energy

Neutrino mass



Muon “g−2”

…

resonances

LLCP

“more exotic”

Outline

1)

2) LLCP

3) more exotic

18 /134

Missing energy at the LHC

19 /134

: primary search target @ LHC

proton proton

Dark matter

…neutral & (almost) stable


20 /134


proton proton q/g q/g

Dark matter



21 /134



DM

DM

Dark matter



22 /134



DM

DM

Dark matter



23 /134

mET : primary search target @ LHC


(mET)

Dark matter



24 /134

mET : primary search target @ LHC

We cannot “see” mET.

mET + something

from ISR: “mono-jet” “mono-photon” etc. DM searches at LHC (Shih-Chieh Hsu’s talk)

from cascade decay: “SUSY” searches

“SUSY” searches at the LHC

25 /134

“SUSY” searches : something + mET

the list of “something”

“SUSY” searches at the LHC

26 /134

“SUSY” searches : something + mET

… What is “something”?

hep-ex people: We will look at anything we can see!

... if we had infinite time.

hep-ph people will answer

based on their theory

hep-ex hep-ph

“what should we see at first?”

SUSY

27 /134

A theory : SUSY (supersymmetry)

SM MSSM

Boson — Fermion

[Higgsino]

[smu]

[squark]

+SUSY

SUSY

28 /134

MSSM =

Image by MissBJ [CC BY 3.0], via Wikimedia Commons (changes were made by S.I.)

[Standard Model]

https://commons.wikimedia.org/wiki/User:MissMJ

http://creativecommons.org/licenses/by/3.0





https://commons.wikimedia.org/wiki/File:Standard_Model_of_Elementary_Particles.svg


[Minimal Supersymmetric Standard Model]

SUSY

29 /134

MSSM =








[Minimal Supersymmetric Standard Model]

SUSY

30 /134

MSSM =








SUSY

31 /134

Why SUSY?

( )

Dark matter

Dark energy

Neutrino mass


Higgs mass “naturalness”

Muon “g−2”

…

Outline

1)

2) LLCP

3) more exotic

32 /134

“SUSY” filter

Naturalness problem

33 /134

104 GeV2 cut-off (Planck or GUT scale)

unnatural

Naturalness problem

34 /134


cancel

Naturalness problem little hierarchy problem

35 /134


cancel

Kitano, Nomura [hep-ph/0602096]

“natural” if


36 /134

cancel

“natural” if

Kitano, Nomura [hep-ph/0602096]

MSSM condition for EWSB:

“natural” if

Higgsino mass


37 /134

Papucci, Ruderman, Weiler [1110.6926]

“Natural SUSY”

interesting channel: “stop search”

(and squark/gluon search

)

[GeV]t~m

200 400 600 800 1000 1200

[G

eV

]10

c~m

0

100

200

300

400

500

600

700

800

900

CMS Preliminary

10c~ t® t

~, t

~t~ ®pp ICHEP 2016

13 TeVExpected

Observed-1

), 12.9 fbmissTSUS-16-014, 0-lep (H

-1), 12.9 fbT2SUS-16-015, 0-lep (M

-1), 12.9 fbTaSUS-16-016, 0-lep (

-1SUS-16-029, 0-lep stop, 12.9 fb

-1SUS-16-030, 0-lep (top tag), 12.9 fb

-1SUS-16-028, 1-lep stop, 12.9 fb

-1Combination 0-lep and 1-lep stop, 12.9 fb

0

1c~

+ m

t

= m

t~m

Naturalness stop search

38 /134

10% tuning

20% tuning

Naturalness stop search

39 /134

10% tuning

20% tuning

last resort?? Do we need more fine-tune?

Cf. gluon searches

40 /134

10% tuning

20% tuning

A comment on Naturalness: Higgs mass = 125 GeV

41 /134

LHC:

tree

stop left-right mixing α is Large and/or

(at least one) heavy stop

disfavors “natural”


42 /134

LHC:

tree

stop left-right mixing α is Large and/or

(at least one) heavy stop


43 /134

A canonical illustration: Hall, Pinner, Ruderman [1112.2703]

Outline

1)

2) LLCP

3) more exotic

44 /134

“SUSY” filter

Muon g−2 anomaly: Overview

45 /134

Hagiwara, Liao, Martin, Nomura, Teubner [1105.3149]

Muon g−2 [anomalous magnetic moment]

…3.3σ

extra contribution? MSSM!

Muon g−2 SM expectation : discrepancy!

46 /134

QED W,Z,H

(5-loop) (2+-loop)

QCD

QED: Aoyama, Hayakawa, Kinoshita, Nio [1205.5370]. EW: Gnendiger, Stöckinger, Stöckinger-Kim [1306.5546]. HVP: Hagiwara, Liao, Martin, Nomura, Teubner [1105.3149]. HLbL: Prades, De Rafael, Vainshtein [0901.0306].

See also: HVP-LO: Davier, Hoecker, Malaescu, Zhang [1010.4180], HVP-HO: Kurz, Liu, Marquard, Steinhauser [1403.6400], HLbL: Jegerlehner, Nyffeler [0902.3360], Colangelo, Hoferichter, Nyffeler, Passera, Stoffer [1403.7512]


47 /134

QED W,Z,H

(5-loop) (2+-loop)

QCD




48 /134

QED W,Z,H

(5-loop) (2+-loop)

QCD




49 /134

had. vac. polarization

QED W,Z,H

(5-loop) (2+-loop) (low-energy EFT) (dispersion rel.)

had. light-by-light




50 /134


QED W,Z,H


had. light-by-light

+)




51 /134


QED W,Z,H


had. light-by-light

+)



3.3σ anomaly


52 /134


QED W,Z,H


had. light-by-light

+)



3.3σ anomaly

Lopez, Nanopoulos, Wang [ph/9308336] Chattopadhyay, Nath [ph/9507386]

Moroi [ph/9512396]

Muon g−2 anomaly can be solved by SUSY

53 /134

SM SUSY ?

MSSM Drell-Yan cross section (in gauge eigenstates)

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(tree-level)

[GeV]

[fb]

Five types of signatures from Neutralino-Chargino production

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; then?

Z-unlike

but Z-like leptons


56 /134

; then?


57 /134

; then?

(some may be soft)

Muon g−2 vs LHC (1) 3-lepton signature

58 /134

pMSSM w. -decoupled.

also decoupled.

Endo, Hamaguchi, SI, Yoshinaga [1303.4256]

8TeV, 13.0/fb ATL-CONF-2012-154

Muon g−2 vs LHC (1) 3-lepton signature

59 /134

Endo, Hamaguchi, SI, Yoshinaga [1303.4256]

8TeV, 13.0/fb ATL-CONF-2012-154

pMSSM w. -decoupled.

also decoupled.

Muon g−2 vs LHC (1) 3-lepton signature : LHC Run 2

60 /134

Warning Assumptions for model simplification! Crosssection is for !! Read the papers!


61 /134



62 /134


Muon g−2 vs LHC (1) 3-lepton signature : CMS degenerate at Run 1

63 /134

ISR + 2-lepton [1512.08002] VBF + 2-lepton [1508.07628]

Outline

1)

2) LLCP

3) more exotic

64 /134

“SUSY” filter

Outline

1)

2) LLCP

3) more exotic

65 /134

“SUSY” filter

SUSY contribution to muon g−2 : gauge basis

66 /134

“mass insertion”

SUSY contribution to muon g−2 : gauge basis

67 /134

Muon g−2 vs LHC (1) 3-lepton signature coming from Wino-Higgsino contribution

68 /134

Wino contributions [red+blue; tree; slep=sneu]

Muon g−2 vs LHC (2) Pure-bino contribution results in slepton pair-production

69 /134

from

μ tanβ has upper bounds:

Endo, Hamaguchi, Kitahara, Yoshinaga [1309.3065]


70 /134

from

μ tanβ has upper bounds:

Endo, Hamaguchi, Kitahara, Yoshinaga [1309.3065]


71 /134

[1403.5294]


72 /134

Outline

1)

2) LLCP

3) more exotic

73 /134

“SUSY” filter

Outline

1)

2) LLCP

3) more exotic

74 /134

“SUSY” filter

One more comment…

75 /134

Ready for single-quark observation!

LLCP

1. Motivations

2. How to detect?

3. Current and future

Motivations for LLCP

77 /134

DM relic abundance (esp. to ameliorate DM over-abundance)

co-annihilation

super-WIMP scenario

Li problem

MSSM with

active in the early Universe cosmological motivations

Sato, Shimomura, Yamanaka [1604.04769]

next slides

LLCP signature charged (quasi-) stable particles

DM as a thermal relic

78 /134

Early Universe with

thermal equilibrium pair creation pair annihilation


79 /134

Early Universe with

thermal equilibrium pair creation pair annihilation


80 /134

Early Universe with

pair creation pair annihilation

far apart due to • pair annihilation • Universe’s expansion

“thermal relic”

DM as a thermal relic : overabundance

81 /134

“observed” relic density

“proper” crosssection of (DM)(DM)SM

Figure from Gelmini and Gondolo, 1009.3690




DM as a thermal relic : overabundance

82 /134

“observed” relic density

“proper” crosssection of (DM)(DM)SM

Sometimes overabundant :

e.g. MSSM with -DM 100 GeV overabundant

mechanisms for

co-annihilation Binetruy, Girardi, Salati (1984), Griest, Seckel (1991)

super-WIMP Feng, Rajaraman, Takayama [ph/0306024]

MSSM4G Abdullah, Feng [1510.06089]

and a lot more…

Co-annihilation scenario

83 /134

Co-annihilation

extra process

small mass splitting LLCP

Co-annihilation scenario

84 /134

Co-annihilation

Bino-stau 700 GeV

Bino-Wino 3 TeV

Bino-gluino 7-8 TeV

Bino-stop ~8 TeV

cf. [1403.0715], [1404.5571], etc.

late-time decay

Super-WIMP scenario

85 /134

Super-WIMP

slepton as thermal relic with

gravitino

NLSP

LSP (DM)

Super-WIMP scenario

86 /134

SM

SM

LLCP ( as a working example)

1. Motivations

2. How to detect?


ATLAS detector

88 /134

p p

ATLAS detector

89 /134

p p

ATLAS detector

90 /134

p p

0 1 2 3 4 5 10 [m]

inner detectors (trackers)

calorimeters muon spectrometer

hadron

Ecal Hcal

light

heavy

91 /134

“Mass measurement” to distinguish long-lived sleptons

92 /134

mass measurement = p & β measurements

momentum & velocity

momentum velocity

• TOF [time-of-flight]

• dE/dx [ionization energy loss]

“Mass measurement” to distinguish long-lived sleptons

93 /134

mass measurement = p & β measurements

momentum & velocity

momentum ATLAS: muon β resolution

velocity

• TOF [time-of-flight]

• dE/dx [ionization energy loss]


1. Motivations

2. How to detect?


Latest limits

95 /134

360 GeV [CMS]

[CMS-PAS-EXO-16-036]

286 GeV [ATLAS] [1411.6795]

See also: LHCb-CONF-2014-001

For

(direct production)

14 TeV LHC expectation

96 /134

Detector

similar to ATLAS/CMS

β-resolution same as ATLAS (resolution: 2.4%)

Signal: Madgraph5 + Pythia6 + Delphes3 (calculated at the LO)

BKG: “Snowmass 2013” BKG set for 14 TeV (publicly available)

Pile-up not considered

Feng, SI, Shadmi, Tarem [1505.02996]

-selection flow

Event selection



97 /134


98 /134

14 TeV LHC prospects are also studied in [1106.0764] & [1203.1581] by J. Heisig and J. Kersten.








1. Motivations

2. How to detect?

3. Current and future and more

0 1 2 3 4 5 10 [m]

inner detectors (trackers)

calorimeters muon spectrometer

hadron

Ecal Hcal

light

heavy

100 /134

Figure from Groom, Mokhov, Striganov, Atom. Nucl. Data Tab. 78 (2001) 183-356 [also in PDG Review “Passage of particles through matter”]

Muon energy loss in matter

101 /134

http://www.sciencedirect.com/science/article/pii/S0092640X01908617






Figure from Groom, Mokhov, Striganov, Atom. Nucl. Data Tab. 78 (2001) 183-356 [also in PDG Review “Passage of particles through matter”]

Muon energy loss in matter

102 /134

Bremsstrahlung

Photonuclear interaction

pair-production

Muon radiative energy loss

Muon energy loss in 3m iron (Fe) “calorimeter”

103 /134


[Simulated with GEANT 4]


Assumptions

104 /134

Detector

similar to ATLAS/CMS

β-resolution same as ATLAS (resolution: 2.4%)

Signal: Madgraph5 + Pythia6 + Delphes3 (calculated at the LO)

BKG: “Snowmass 2013” BKG set for 100TeV (publicly available)

Pile-up not considered


-selection flow

Event selection




Result: cut flow

105 /134

-selection flow

Event selection

LLCP selection flow

Event categorization

SR


signal SM BKG




SR

signal SM BKG

LLCP selection flow

Event categorization

Result: cut flow

106 /134

-selection flow

Event selection

Eloss reduces 34% of BKG



Result: Expected exclusion limit

107 /134





Result: Expected exclusion limit

108 /134

mixing-angle dependence



The mass resolution is very bad?

109 /134

Implication to Cosmology

110 /134

will covered @ LHC

Outline

1)

2) LLCP

3) more exotic

111 /134

“SUSY” filter

co-annihilation in coming years!

(R-hadron, displaced vertex, disappearing track, …)

(ph/0511034, 1403.0715, 1409.4533,1504.00504, 1506.08206, ...)

“Exotic” searches by ATLAS + CMS

112 /134


113 /134

List of 13 TeV EXO results (ATLAS-EXO, CMS-EXO, CMS-B2G)

DM searches

Resonances

LLCP and new signature

“new phenomena” (signature based)

OTHERS


114 /134

“others” ?

black holes

doubly-charged Higgs

strong gravity

TeV-scale gravity signatures

excited leptons / quarks

four-top-quark production

composite Majorana neutrinos

quark contact interactions & extra dim

type-III seesaw fermion

pair-produced Higgs

pair-produced resonances in four jets

pair-produced first- / second-generation scalar LQ

right-handed W and third-generation scalar LQ

right-handed nu and third-generation scalar LQ

vector-like quarks (pair-production) (single-production)


115 /134

“others” ?

black holes

doubly-charged Higgs

strong gravity

TeV-scale gravity signatures

excited leptons / quarks

four-top-quark production

composite Majorana neutrinos

quark contact interactions & extra dim

type-III seesaw fermion

pair-produced Higgs

pair-produced resonances in four jets

pair-produced first- / second-generation scalar LQ

right-handed W and third-generation scalar LQ

right-handed nu and third-generation scalar LQ

vector-like quarks (pair-production) (single-production)

Extending (MS)SM with vector-like fermions

116 /134

SM + vector-like fermions:

MSSM + vector-like fermions

no gauge anomaly

consistent w. EWPT & Higgs data (unlike chiral 4th gen)

one Dirac fermion “vector-like fermion”

QUE model : MSSM +

gauge coupling unification

SU(5) GUT

extra interaction mh

QDEE model : MSSM +


SU(5) GUT

extra coupling mh slightly

Vector-like fermions : motivations in MSSM

117 /134

MSSM + VLF

2 models for coupling unification

(you can also append pairs)


118 /134


measured theoretical prediction


119 /134


measured theoretical prediction


120 /134

MSSM + VLF


QUE model : MSSM +


SU(5) GUT


QDEE model : MSSM +


SU(5) GUT


SUSY scale can be lowered. (but still unnatural because μ is enhanced.)

Vector-like quark search

121 /134

(otherwise stable VLQ)

depending on mixing btw. vec-like/SM quarks.

(usually 3rd gen is chosen to avoid flavor constraints)

multi b-quark signature with BR dependence

(QUE model)


122 /134

(otherwise stable VLQ)

depending on mixing btw. vec-like/SM quarks.

(usually 3rd gen is chosen to avoid flavor constraints)

multi b-quark signature with BR dependence

(QUE model)

Vector-like quark search (Run 1 summary + Run 2 ATL-CONF-2016-101)

123 /134

Vector-like quark search (Run 1 summary + Run 2 ATL-CONF-2016-101)

124 /134

Outline

1)

2) LLCP

3) more exotic

125 /134

“SUSY” filter



(ph/0511034, 1403.0715, 1409.4533,1504.00504, 1506.08206, ...)

many more searches…

VLQ

VLL

QUE model : MSSM +


SU(5) GUT


QDEE model : MSSM +


SU(5) GUT



126 /134

MSSM + VLF


(you can also append pairs)

VLL as a solution of overabundance : MSSM4G

127 /134

pure-Bino DM with 100 GeV overabundant

extra annihilation channel larger “proper”

if


128 /134

pure-Bino DM with 100 GeV overabundant

if


129 /134

(otherwise stable VLL)

depending on mixing btw. vec-like/SM leptons.

(flavor constraints are not strict)

multi lepton signature dependent on ratio

(QUE model)

BR fixed but ratio not fixed

VLL search prospects at 14 TeV LHC

130 /134

IF

LHC constraints!

IF

No constraints from LHC or HL-LHC.

This scenario will be perfectly searched by CTA gamma-ray observation.

VLL search prospects at 14 TeV LHC

131 /134

IF

Snowmass BKG set is used.

MG5–Pythia–Delphes + NLO K-factor

di-boson + tt dominated

Signal by FR–MG5aMC–Pythia–Delphes (LO)

SR dedicated for WZ / ZZ + leptons

3L, 4L for WZ, and 4L, 5L for ZZ

tau-tag / b-tag not used (avoided)

Uncertainties = stat. + 20% syst.

VLL mass [GeV]200 250 300 350 400 450 500

cros

s sec

tion

[fb]

10

210 at 300fbexp

UL;95%σ

at 1000fbexpUL;95%σ

at 3000fbexpUL;95%σ

LO cross section (QUE)

LO cross section (QDEE)

14 TeV LHC exclusione-mixed VLL

0.3ab 1ab 3ab (with 1&2σ band)

Collider prospects summary

132 /134

LHC insensitive, but CTA covers full region

ℓ ( )

-

-

-

ℓ~ [ ]

~[

]ℓ ( )

-

-

-

ℓ~ [ ]

~[

]

QUE QDEE


133 /134

LHC insensitive, but CTA covers full region

ℓ ( )

-

-

-

ℓ~ [ ]

~[

]ℓ ( )

-

-

-

ℓ~ [ ]

~[

]

QUE QDEE

CTA CTA

Outline

1)

2) LLCP

3) more exotic

134 /134

“SUSY” filter



(ph/0511034, 1403.0715, 1409.4533,1504.00504, 1506.08206, ...)

many more searches…

VLQ

VLL

Documents

BSM at Colliders20161018-Gwangju... · 2017. 11. 26. · BSM at Colliders. Sho. IWAMOTO This 2-hour presentation is based on my works M. Endo, K. Hamaguchi, SI, N. Yokozaki, Higgs