Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in √s=7 TeV proton–proton collisions

ATLAS Collaboration

doi:10.1016/j.physletb.2013.01.049

Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in √s=7 TeV proton–proton collisions

ATLAS Collaboration

University of Freiburg
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University of Oklahoma
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Université Paris-Sud and CNRS/IN2P3
University of Geneva
Azerbaijan National Academy of Sciences
University of Amsterdam
Oklahoma State University
Michigan State University
University of Toronto
Tel Aviv University
CEA Saclay (Commissariat a lʼEnergie Atomique)
National Institute for Nuclear Physics
University of Milan
Abdus Salam International Centre for Theoretical Physics
AGH University of Krakow
United States Department of Energy
Hampton University
Yale University
Ludwig Maximilian University of Munich
Queen Mary University of London
Didcot
Brandeis University
Laboratório de Instrumentação e Física Experimental de Partículas
University of Granada
University of Bern
Johannes Gutenberg University Mainz
Boston University
Stony Brook University
University of Texas at Dallas
University of Rome Tor Vergata
Bogazici University
Lund University
The University of Tokyo
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
SUNY Albany
Royal Holloway University of London
University of Victoria BC
Laboratoire de Physique Subatomique et de Cosmologie de Grenoble
CERN
Joint Institute for Nuclear Research
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
University of Udine
Humboldt University of Berlin
Kobe University
University of Pennsylvania
University of Birmingham
University of Liverpool
University of Glasgow
University of Manchester
University of Naples Federico II
Weizmann Institute of Science
Universidad Nacional de La Plata
High Energy Accelerator Research Organization, Tsukuba
Institute for High Energy Physics of National Research Centre ‘Kurchatov Institute’
University of Lisbon
Columbia University
Heidelberg University
The University of Chicago
Technische Universität Dresden
Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
National and Kapodistrian University of Athens
Moscow Engineering Physics Institute
Slovak Academy of Sciences
Nagoya University
Aix-Marseille Université and CNRS/IN2P3
CNRS/IN2P3 and Université de Savoie
University of Oxford
SLAC National Accelerator Laboratory
Duke University
Lawrence Berkeley National Laboratory
University of Michigan, Ann Arbor
Universidad Autónoma de Madrid
Alikhanov Institute for Theoretical and Experimental Physics
University of Rome La Sapienza
University of Wisconsin-Madison
University of Cambridge
Stockholm University
The Oskar Klein Centre
Argonne National Laboratory
University of Johannesburg
University of Illinois at Urbana-Champaign
Czech Technical University in Prague
University of California at Irvine
University of British Columbia
University of Montreal
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Roma Tre University
University of Alberta
CAS - Institute of High Energy Physics
University College London
Polish Academy of Sciences
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Max Planck Institute for Physics (Werner Heisenberg Institute)
University of Wuppertal
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Laboratoire de Physique Nucléaire et de Hautes Energies
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Technion-Israel Institute of Technology
University of Iowa
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Novosibirsk State University
University of Hassan II Casablanca
York University Toronto
University of Regina
German Electron Synchrotron
University of Bologna
University of Pisa
Radboud University Nijmegen
University of Edinburgh
University of Salento
University of Göttingen
CNRS/IN2P3
University of Copenhagen
Belarus Academy of Sciences
Czech Academy of Sciences
University of Sheffield
University of Belgrade
University of Pittsburgh
Université Clermont Auvergne
University of Texas at Arlington
Tokyo Metropolitan University
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Academia Sinica - Institute of Physics
Jožef Stefan Institute
University of Pavia
University of Naples Parthenope
Institute of Particle Physics
National University of Science and Technology POLITEHNICA Bucharest
West University of Timisoara
Simon Fraser University
Middle East Technical University
Mohamed I University
Louisiana Tech University
Pontificia Universidad Católica de Chile
Southern Methodist University
Ivane Javakhishvili Tbilisi State University
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California Institute of Technology
Jagiellonian University in Kraków
Nagasaki Institute of Applied Science
TOBB University of Economics and Technology
Kyoto University of Education
Ritsumeikan University
Massachusetts Institute of Technology
Turkish Atomic Energy Authority
University of KwaZulu-Natal
Belarusian State University
Gazi University

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42 引用（Scopus）

摘要

The results of a search for pair production of light top squarks are presented, using 4.7 fb⁻¹ of s=7 TeV proton–proton collisions collected with the ATLAS detector at the Large Hadron Collider. This search targets top squarks with masses similar to, or lighter than, the top quark mass. Final states containing exclusively one or two leptons (e,μ), large missing transverse momentum, light-flavour jets and b-jets are used to reconstruct the top squark pair system. Event-based mass scale variables are used to separate the signal from a large tt¯ background. No excess over the Standard Model expectations is found. The results are interpreted in the framework of the Minimal Supersymmetric Standard Model, assuming the top squark decays exclusively to a chargino and a b-quark, while requiring different mass relationships between the Supersymmetric particles in the decay chain. Light top squarks with masses between 123–167 GeV are excluded for neutralino masses around 55 GeV.

源语言	英语
页（从-至）	13-31
页数	19
期刊	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
卷	720
期	1-3
DOI	https://doi.org/10.1016/j.physletb.2013.01.049
出版状态	已出版 - 13 3月 2013
已对外发布	是

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@article{e7997879e8e5452284c3bcdf517df4b5,

title = "Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in √s=7 TeV proton–proton collisions",

abstract = "The results of a search for pair production of light top squarks are presented, using 4.7 fb−1 of s=7 TeV proton–proton collisions collected with the ATLAS detector at the Large Hadron Collider. This search targets top squarks with masses similar to, or lighter than, the top quark mass. Final states containing exclusively one or two leptons (e,μ), large missing transverse momentum, light-flavour jets and b-jets are used to reconstruct the top squark pair system. Event-based mass scale variables are used to separate the signal from a large tt¯ background. No excess over the Standard Model expectations is found. The results are interpreted in the framework of the Minimal Supersymmetric Standard Model, assuming the top squark decays exclusively to a chargino and a b-quark, while requiring different mass relationships between the Supersymmetric particles in the decay chain. Light top squarks with masses between 123–167 GeV are excluded for neutralino masses around 55 GeV.",

author = "\{ATLAS Collaboration\} and G. Aad and T. Abajyan and B. Abbott and J. Abdallah and \{Abdel Khalek\}, S. and Abdelalim, \{A. A.\} and O. Abdinov and R. Aben and B. Abi and M. Abolins and AbouZeid, \{O. S.\} and H. Abramowicz and H. Abreu and E. Acerbi and Acharya, \{B. S.\} and L. Adamczyk and Adams, \{D. L.\} and Addy, \{T. N.\} and J. Adelman and S. Adomeit and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, \{J. A.\} and M. Agustoni and M. Aharrouche and Ahlen, \{S. P.\} and F. Ahles and A. Ahmad and M. Ahsan and G. Aielli and T. Akdogan and {\AA}kesson, \{T. P.A.\} and G. Akimoto and Akimov, \{A. V.\} and Alam, \{M. S.\} and Alam, \{M. A.\} and J. Albert and S. Albrand and M. Aleksa and Aleksandrov, \{I. N.\} and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and M. Alhroob and M. Aliev and G. Alimonti and L. Yuan",

note = "Publisher Copyright: {\textcopyright} 2013 CERN",

year = "2013",

month = mar,

day = "13",

doi = "10.1016/j.physletb.2013.01.049",

language = "英语",

volume = "720",

pages = "13--31",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1-3",

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TY - JOUR

T1 - Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in √s=7 TeV proton–proton collisions

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abajyan, T.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdel Khalek, S.

AU - Abdelalim, A. A.

AU - Abdinov, O.

AU - Aben, R.

AU - Abi, B.

AU - Abolins, M.

AU - AbouZeid, O. S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Acerbi, E.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Adomeit, S.

AU - Adragna, P.

AU - Adye, T.

AU - Aefsky, S.

AU - Aguilar-Saavedra, J. A.

AU - Agustoni, M.

AU - Aharrouche, M.

AU - Ahlen, S. P.

AU - Ahles, F.

AU - Ahmad, A.

AU - Ahsan, M.

AU - Aielli, G.

AU - Akdogan, T.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Alam, M. S.

AU - Alam, M. A.

AU - Albert, J.

AU - Albrand, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alessandria, F.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexandre, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Aliev, M.

AU - Alimonti, G.

AU - Yuan, L.

PY - 2013/3/13

Y1 - 2013/3/13

N2 - The results of a search for pair production of light top squarks are presented, using 4.7 fb−1 of s=7 TeV proton–proton collisions collected with the ATLAS detector at the Large Hadron Collider. This search targets top squarks with masses similar to, or lighter than, the top quark mass. Final states containing exclusively one or two leptons (e,μ), large missing transverse momentum, light-flavour jets and b-jets are used to reconstruct the top squark pair system. Event-based mass scale variables are used to separate the signal from a large tt¯ background. No excess over the Standard Model expectations is found. The results are interpreted in the framework of the Minimal Supersymmetric Standard Model, assuming the top squark decays exclusively to a chargino and a b-quark, while requiring different mass relationships between the Supersymmetric particles in the decay chain. Light top squarks with masses between 123–167 GeV are excluded for neutralino masses around 55 GeV.

AB - The results of a search for pair production of light top squarks are presented, using 4.7 fb−1 of s=7 TeV proton–proton collisions collected with the ATLAS detector at the Large Hadron Collider. This search targets top squarks with masses similar to, or lighter than, the top quark mass. Final states containing exclusively one or two leptons (e,μ), large missing transverse momentum, light-flavour jets and b-jets are used to reconstruct the top squark pair system. Event-based mass scale variables are used to separate the signal from a large tt¯ background. No excess over the Standard Model expectations is found. The results are interpreted in the framework of the Minimal Supersymmetric Standard Model, assuming the top squark decays exclusively to a chargino and a b-quark, while requiring different mass relationships between the Supersymmetric particles in the decay chain. Light top squarks with masses between 123–167 GeV are excluded for neutralino masses around 55 GeV.

UR - https://www.scopus.com/pages/publications/85042053947

U2 - 10.1016/j.physletb.2013.01.049

DO - 10.1016/j.physletb.2013.01.049

M3 - 文章

AN - SCOPUS:85042053947

SN - 0370-2693

VL - 720

SP - 13

EP - 31

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-3

ER -

Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in √s=7 TeV proton–proton collisions

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