Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at $\sqrt{s}$=8 TeV - INSPIRE

DataBETA

Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at $\sqrt{s}$ =8 TeV

CMS

Collaboration

Aug 4, 2014

21 pages

Published in:

Phys.Lett.B 739 (2014) 229-249

Published: Dec 12, 2014

e-Print:

1408.0806 [hep-ex]

DOI:

10.1016/j.physletb.2014.10.063

PDG: R-parity violating

{{\widetilde{\mathit t}}}

(Stop) mass limit

Report number:

CMS-EXO-12-032,
CERN-PH-EP-2014-190

Experiments:

CERN-LHC-CMS

View in:

reference search110 citations

Citations per year

Abstract: (Elsevier)

A search for pair production of third-generation scalar leptoquarks and supersymmetric top quark partners, top squarks, in final states involving tau leptons and bottom quarks is presented. The search uses events from a data sample of proton–proton collisions corresponding to an integrated luminosity of 19.7 fb −1 , collected with the CMS detector at the LHC with s=8 TeV . The number of observed events is found to be in agreement with the expected standard model background. Third-generation scalar leptoquarks with masses below 740 GeV are excluded at 95% confidence level, assuming a 100% branching fraction for the leptoquark decay to a tau lepton and a bottom quark. In addition, this mass limit applies directly to top squarks decaying via an R-parity violating coupling λ333′ . The search also considers a similar signature from top squarks undergoing a chargino-mediated decay involving the R-parity violating coupling λ3jk′ . Each top squark decays to a tau lepton, a bottom quark, and two light quarks. Top squarks in this model with masses below 580 GeV are excluded at 95% confidence level. The constraint on the leptoquark mass is the most stringent to date, and this is the first search for top squarks decaying via λ3jk′ .

Note:

Replaced with published version. Added journal reference and DOI

CMS
Physics
Leptoquark
Top squark
leptoquark: scalar
new physics: search for
R parity: violation
p p: scattering
stop: decay
leptoquark: decay

References(46)

Figures(5)

[1]

Unity of All Elementary Particle Forces

H. Georgi
(
- Harvard U.
)
,
S.L. Glashow
(
- Harvard U.
)

- Phys.Rev.Lett. 32 (1974) 438-441,
- Also in *Lichtenberg, D.B. (ed.), Rosen, S.P. (ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 492-495, and in *Froggatt, C.D., Nielsen, H.B.: Origin of symmetries* 330-333
•
DOI:
- 10.1103/PhysRevLett.32.438

[2]

Lepton Number as the Fourth Color

Jogesh C. Pati
(
- Maryland U.
)
,
Abdus Salam
(
- ICTP, Trieste and
- Imperial Coll., London
)

- Phys.Rev.D 10 (1974) 275-289,
- Phys.Rev.D 11 (1975) 703-703 (erratum)
•
DOI:
- 10.1103/PhysRevD.10.275

[3]

Composite Leptoquarks at the LHC

Ben Gripaios
(
- CERN
)

- JHEP 02 (2010) 045
•
e-Print:
- 0910.1789
•
DOI:
- 10.1007/JHEP02(2010)045

[4]

Low-Energy Phenomenology of Superstring Inspired E(6) Models

JoAnne L. Hewett
(
- Wisconsin U., Madison
)
,
Thomas G. Rizzo
(
- Ames Lab and
- Iowa State U.
)

- Phys.Rept. 183 (1989) 193
•
DOI:
- 10.1016/0370-1573(89)90071-9

[5]

Dynamical Breaking of Weak Interaction Symmetries

Estia Eichten
(
- Harvard U.
)
,
Kenneth D. Lane
(
- Harvard U.
)

- Phys.Lett.B 90 (1980) 125-130,
- Also in *Farhi, E. (ed.), Jackiw, R. (ed.): Dynamical Gauge Symmetry Breaking*, 177-182
•
DOI:
- 10.1016/0370-2693(80)90065-9

[6]

$\pi \ell$ 2, $K \ell$ 3 and $K^0 - \bar{K}$ 0 Constraints on Leptoquarks and Supersymmetric Particles

Oruganti U. Shanker
(
- TRIUMF
)

- Nucl.Phys.B 204 (1982) 375-386
•
DOI:
- 10.1016/0550-3213(82)90196-1

[7]

Supersymmetry, Supergravity and Particle Physics

Hans Peter Nilles
(
- Geneva U. and
- CERN
)

- Phys.Rept. 110 (1984) 1-162
•
DOI:
- 10.1016/0370-1573(84)90008-5

[8]

The Search for Supersymmetry: Probing Physics Beyond the Standard Model

Howard E. Haber
(
- UC, Santa Cruz and
- SLAC
)
,
Gordon L. Kane
(
- Michigan U.
)

- Phys.Rept. 117 (1985) 75-263
•
DOI:
- 10.1016/0370-1573(85)90051-1

[9]

Natural SUSY Endures

Michele Papucci
(
- UC, Berkeley and
- LBL, Berkeley
)
,
Joshua T. Ruderman
(
- UC, Berkeley and
- LBL, Berkeley
)
,
Andreas Weiler
(
- CERN and
- DESY
)

- JHEP 09 (2012) 035
•
e-Print:
- 1110.6926
•
DOI:
- 10.1007/JHEP09(2012)035

[10]

Supersymmetry, naturalness, and signatures at the LHC

Ryuichiro Kitano
(
- SLAC
)
,
Yasunori Nomura
(
- UC, Berkeley and
- LBL, Berkeley
)

- Phys.Rev.D 73 (2006) 095004
•
e-Print:
- hep-ph/0602096
•
DOI:
- 10.1103/PhysRevD.73.095004

[11]

R-parity violating supersymmetry

et al.

- Phys.Rept. 420 (2005) 1-202
•
e-Print:
- hep-ph/0406039
•
DOI:
- 10.1016/j.physrep.2005.08.006

[12]

LHC searches examined via the RPV MSSM

Jared A. Evans
(
- Rutgers U., Piscataway
)
,
Yevgeny Kats
(
- Rutgers U., Piscataway and
- Weizmann Inst.
)

- PoS EPS-HEP2013 (2013) 287
•
e-Print:
- 1311.0890
•
DOI:
- 10.22323/1.180.0287

[13]

Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in $pp$ Collisions at $\sqrt{s}=7$ TeV

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Rev.Lett. 110 (2013) 8, 081801
•
e-Print:
- 1210.5629
•
DOI:
- 10.1103/PhysRevLett.110.081801

[14]

Search for third generation scalar leptoquarks in pp collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector

ATLAS

Collaboration

•

Georges Aad
(
- Freiburg U.
)

et al.

- JHEP 06 (2013) 033
•
e-Print:
- 1303.0526
•
DOI:
- 10.1007/JHEP06(2013)033

[15]

The CMS high level trigger

CMS Trigger

Collaboration

•

W. Adam
(
- Vienna, OAW
)

et al.

- Eur.Phys.J.C 46 (2006) 605-667
•
e-Print:
- hep-ex/0512077
•
DOI:
- 10.1140/epjc/s2006-02495-8

[16]

The CMS Experiment at the CERN LHC

CMS

Collaboration

•

S. Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JINST 3 (2008) S08004
•
DOI:
- 10.1088/1748-0221/3/08/S08004

[17]

Particle-Flow Event Reconstruction in CMS and Performance for Jets, Taus, and MET

CMS

Collaboration

[18]

Commissioning of the Particle-Flow reconstruction in Minimum-Bias and Jet Events from pp Collisions at 7 TeV

CMS

Collaboration

[19]

Particle-flow commissioning with muons and electrons from J/Psi and W events at 7 TeV

CMS

Collaboration

[20]

Performance of tau-lepton reconstruction and identification in CMS

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JINST 7 (2012) P01001
•
e-Print:
- 1109.6034
•
DOI:
- 10.1088/1748-0221/7/01/P01001

[21]

Towards Jetography

Gavin P. Salam
(
- Paris, LPTHE
)

- Eur.Phys.J.C 67 (2010) 637-686
•
e-Print:
- 0906.1833
•
DOI:
- 10.1140/epjc/s10052-010-1314-6

[22]

The anti- $k_t$ jet clustering algorithm

- JHEP 04 (2008) 063
•
e-Print:
- 0802.1189
•
DOI:
- 10.1088/1126-6708/2008/04/063

[23]

Determination of Jet Energy Calibration and Transverse Momentum Resolution in CMS

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JINST 6 (2011) P11002
•
e-Print:
- 1107.4277
•
DOI:
- 10.1088/1748-0221/6/11/P11002

[24]

Identification of b-Quark Jets with the CMS Experiment

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- JINST 8 (2013) P04013
•
e-Print:
- 1211.4462
•
DOI:
- 10.1088/1748-0221/8/04/P04013

[25]

PYTHIA 6.4 Physics and Manual

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)
,
Stephen Mrenna
(
- Fermilab
)
,
Peter Z. Skands
(
- Fermilab
)

- JHEP 05 (2006) 026
•
e-Print:
- hep-ph/0603175
•
DOI:
- 10.1088/1126-6708/2006/05/026

1-25 of 46
1
2
25 / page