Search for light scalar top-quark pair production in final states with two leptons with the ATLAS detector in √s =7 TeV proton–proton collisions

The ATLAS Collaboration

doi:10.1140/epjc/s10052-012-2237-1

Search for light scalar top-quark pair production in final states with two leptons with the ATLAS detector in √s =7 TeV proton–proton collisions

The ATLAS Collaboration

CERN
University of Freiburg
Physikalisches Institut
University of Bonn
Homer L. Dodge Department of Physics and Astronomy
University of Oklahoma
Institute for High Energy Physics
Université Paris-Sud and CNRS/IN2P3
Section de Physique
University of Geneva
Azerbaijan National Academy of Sciences
University of Amsterdam
Department of Physics
Oklahoma State University
Department of Physics and Astronomy
Michigan State University
Department of Physics
University of Toronto
Raymond and Beverly Sackler School of Physics and Astronomy
Tel Aviv University
CEA Saclay (Commissariat a lʼEnergie Atomique)
National Institute for Nuclear Physics
Dipartimento di Fisica
University of Milan
Abdus Salam International Centre for Theoretical Physics
AGH University of Krakow
Physics Department
Brookhaven National Laboratory
Department of Physics
Hampton University
Yale University
Ludwig Maximilian University of Munich
School of Physics and Astronomy
Queen Mary University of London
Didcot
Department of Physics
Brandeis University
Laboratório de Instrumentação e Física Experimental de Partículas
Departamento de Fisica Teorica y del Cosmos and CAFPE
University of Granada
Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics
University of Bern
Institut für Physik
Johannes Gutenberg University Mainz
Boston University
Departments of Physics and Astronomy and Chemistry
Stony Brook University
Physics Department
University of Texas at Dallas
Dipartimento di Fisica
University of Rome Tor Vergata
Department of Physics
Bogazici University
Lund University
The University of Tokyo
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Physics Department
SUNY Albany
Department of Physics
Royal Holloway University of London
Department of Physics and Astronomy
University of Victoria BC
Laboratoire de Physique Subatomique et de Cosmologie de Grenoble
Joint Institute for Nuclear Research
Horia Hulubei National Institute of Physics and Nuclear Engineering
Physics Department
National Technical University of Athens
Dipartimento di Chimica
University of Udine
Department of Physics
Humboldt University of Berlin
Kobe University

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

A search is presented for the pair production of light scalar top quarks in √s = 7 TeV proton–proton collisions recorded with the ATLAS detector at the Large Hadron Collider. This analysis uses the full data sample collected during 2011 running that corresponds to a total integrated luminosity of 4.7 fb⁻¹. Light scalar top quarks are searched for in events with two opposite-sign leptons (e, μ), large missing transverse momentum and at least one jet in the final state. No excess over Standard Model expectations is found, and the results are interpreted under the assumption that the light scalar top decays to a b-quark in addition to an on-shell chargino whose decay occurs through a virtual W boson. If the chargino mass is 106 GeV, light scalar top-quark masses up to 130 GeV are excluded for neutralino masses below 70 GeV.

Original language	English
Article number	2237
Journal	European Physical Journal C
Volume	72
Issue number	11
DOIs	https://doi.org/10.1140/epjc/s10052-012-2237-1
State	Published - 30 Nov 2012
Externally published	Yes

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10.1140/epjc/s10052-012-2237-1

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@article{ba784188db544a96b6a8e62b52977119,

title = "Search for light scalar top-quark pair production in final states with two leptons with the ATLAS detector in √s =7 TeV proton{\textendash}proton collisions",

abstract = "A search is presented for the pair production of light scalar top quarks in √s = 7 TeV proton{\textendash}proton collisions recorded with the ATLAS detector at the Large Hadron Collider. This analysis uses the full data sample collected during 2011 running that corresponds to a total integrated luminosity of 4.7 fb−1. Light scalar top quarks are searched for in events with two opposite-sign leptons (e, μ), large missing transverse momentum and at least one jet in the final state. No excess over Standard Model expectations is found, and the results are interpreted under the assumption that the light scalar top decays to a b-quark in addition to an on-shell chargino whose decay occurs through a virtual W boson. If the chargino mass is 106 GeV, light scalar top-quark masses up to 130 GeV are excluded for neutralino masses below 70 GeV.",

author = "\{The ATLAS Collaboration\} and G. Aad and T. Abajyan and B. Abbott and J. Abdallah and Khalek, \{S. Abdel\} 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} 2012, CERN for the benefit of the ATLAS collaboration.",

year = "2012",

month = nov,

day = "30",

doi = "10.1140/epjc/s10052-012-2237-1",

language = "英语",

volume = "72",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "11",

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TY - JOUR

T1 - Search for light scalar top-quark pair production in final states with two leptons with the ATLAS detector in √s =7 TeV proton–proton collisions

AU - The ATLAS Collaboration

AU - Aad, G.

AU - Abajyan, T.

AU - Abbott, B.

AU - Abdallah, J.

AU - Khalek, S. Abdel

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 - 2012/11/30

Y1 - 2012/11/30

N2 - A search is presented for the pair production of light scalar top quarks in √s = 7 TeV proton–proton collisions recorded with the ATLAS detector at the Large Hadron Collider. This analysis uses the full data sample collected during 2011 running that corresponds to a total integrated luminosity of 4.7 fb−1. Light scalar top quarks are searched for in events with two opposite-sign leptons (e, μ), large missing transverse momentum and at least one jet in the final state. No excess over Standard Model expectations is found, and the results are interpreted under the assumption that the light scalar top decays to a b-quark in addition to an on-shell chargino whose decay occurs through a virtual W boson. If the chargino mass is 106 GeV, light scalar top-quark masses up to 130 GeV are excluded for neutralino masses below 70 GeV.

AB - A search is presented for the pair production of light scalar top quarks in √s = 7 TeV proton–proton collisions recorded with the ATLAS detector at the Large Hadron Collider. This analysis uses the full data sample collected during 2011 running that corresponds to a total integrated luminosity of 4.7 fb−1. Light scalar top quarks are searched for in events with two opposite-sign leptons (e, μ), large missing transverse momentum and at least one jet in the final state. No excess over Standard Model expectations is found, and the results are interpreted under the assumption that the light scalar top decays to a b-quark in addition to an on-shell chargino whose decay occurs through a virtual W boson. If the chargino mass is 106 GeV, light scalar top-quark masses up to 130 GeV are excluded for neutralino masses below 70 GeV.

UR - https://www.scopus.com/pages/publications/84871215269

U2 - 10.1140/epjc/s10052-012-2237-1

DO - 10.1140/epjc/s10052-012-2237-1

M3 - 文章

AN - SCOPUS:84871215269

SN - 1434-6044

VL - 72

JO - European Physical Journal C

JF - European Physical Journal C

IS - 11

M1 - 2237

ER -

Search for light scalar top-quark pair production in final states with two leptons with the ATLAS detector in √s =7 TeV proton–proton collisions

Abstract

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