Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV

The ATLAS collaboration

doi:10.1140/epjc/s10052-012-1993-2

Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV

The ATLAS collaboration

Fakultät für Mathematik und Physik
University of Freiburg
University of Oklahoma
Institut de Física d'Altes Energies
University of São Paulo
Section de Physique
University of Geneva
University of Oxford
Azerbaijan Academy of Sciences
Oklahoma State University
Department of Physics and Astronomy
Michigan State University
Tel Aviv University
Laboratoire de l'Accélérateur Linéaire
Sezione INFN di Milano
University of Milano
Sezione di Roma
Abdus Salam International Centre for Theoretical Physics
Brookhaven National Laboratory Physics Department
Department of Physics
Hampton University
Yale University
Max-Planck-Institut für Physik
Fakultät für Physik
Universität München
School of Physics and Astronomy
Queen Mary University of London
Rutherford Appleton Laboratory
Department of Physics
Brandeis University
Departamento de Fisica Teorica y del Cosmos and CAFPE
University of Granada
Lisboa
Johannes Gutenberg University
Boston University
Departments of Physics and Astronomy and Chemistry
Stony Brook University
Physics Department
University of Texas
INFN Roma Tor Vergata
University of Rome “Tor Vergata”
Department of Physics
Bogazici University
Department of Physics
Lund University
International Center for Elementary Particle Physics and Department of Physics
University of Tokyo
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Kobe University
State University of New York Albany
Department of Physics
Royal Holloway University of London
Department of Physics and Astronomy
University of Victoria
Laboratoire de Physique Subatomique et de Cosmologie de Grenoble
European Organization for Nuclear Research
Joint Institute for Nuclear Research, Dubna
Horia Hulubei National Institute of Physics and Nuclear Engineering
Physics Department
National Technical University of Athens
University Bonn
Department of Physics
Humboldt-Universität zu Berlin
University of Pennsylvania School of Arts and Sciences
Universite Paris-Saclay

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

21 Citations (Scopus)

Abstract

In models of anomaly-mediated supersymmetry breaking (AMSB), the lightest chargino is predicted to have a lifetime long enough to be detected in collider experiments. This letter explores AMSB scenarios in pp collisions at (Formula Presented) = 7 TeV by attempting to identify decaying charginos which result in tracks that appear to have few associated hits in the outer region of the tracking system. The search was based on data corresponding to an integrated luminosity of 1.02 fb⁻ ¹collected with the ATLAS detector in 2011. The pT spectrum of candidate tracks is found to be consistent with the expectation from Standard Model background processes and constraints on the lifetime and the production cross section were obtained. In the minimal AMSB framework with m_3/2< 32 TeV, m₀< 1.5 TeV, tanβ = 5 and μ > 0, a chargino having mass below 92 GeV and a lifetime between 0.5 ns and 2 ns is excluded at 95 % confidence level.

Original language	English
Article number	1993
Pages (from-to)	1-20
Number of pages	20
Journal	European Physical Journal C
Volume	72
Issue number	4
DOIs	https://doi.org/10.1140/epjc/s10052-012-1993-2
Publication status	Published - 1 Jun 2012
Externally published	Yes

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10.1140/epjc/s10052-012-1993-2

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@article{1c4a81e5da414c73bf4320d125c892f5,

title = "Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV",

abstract = "In models of anomaly-mediated supersymmetry breaking (AMSB), the lightest chargino is predicted to have a lifetime long enough to be detected in collider experiments. This letter explores AMSB scenarios in pp collisions at (Formula Presented) = 7 TeV by attempting to identify decaying charginos which result in tracks that appear to have few associated hits in the outer region of the tracking system. The search was based on data corresponding to an integrated luminosity of 1.02 fb− 1collected with the ATLAS detector in 2011. The pT spectrum of candidate tracks is found to be consistent with the expectation from Standard Model background processes and constraints on the lifetime and the production cross section were obtained. In the minimal AMSB framework with m3/2< 32 TeV, m0< 1.5 TeV, tanβ = 5 and μ > 0, a chargino having mass below 92 GeV and a lifetime between 0.5 ns and 2 ns is excluded at 95 \% confidence level.",

author = "\{The ATLAS collaboration\} and G. Aad and B. Abbott and J. Abdallah and Abdelalim, \{A. A.\} and A. Abdesselam and O. Abdinov and B. Abi and M. Abolins and H. Abramowicz and H. Abreu and E. Acerbi and Acharya, \{B. S.\} and Adams, \{D. L.\} and Addy, \{T. N.\} and J. Adelman and M. Aderholz and S. Adomeit and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, \{J. A.\} 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 A. Akiyama 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 J. Alison and \{De La Taille\}, C. and Sauvan, \{J. B.\} and O. Simard",

note = "Publisher Copyright: {\textcopyright} CERN for the benefit of the ATLAS collaboration 2012.",

year = "2012",

month = jun,

day = "1",

doi = "10.1140/epjc/s10052-012-1993-2",

language = "English",

volume = "72",

pages = "1--20",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "4",

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TY - JOUR

T1 - Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV

AU - The ATLAS collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdelalim, A. A.

AU - Abdesselam, A.

AU - Abdinov, O.

AU - Abi, B.

AU - Abolins, M.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Acerbi, E.

AU - Acharya, B. S.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Aderholz, M.

AU - Adomeit, S.

AU - Adragna, P.

AU - Adye, T.

AU - Aefsky, S.

AU - Aguilar-Saavedra, J. A.

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 - Akiyama, A.

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 - Alison, J.

AU - De La Taille, C.

AU - Sauvan, J. B.

AU - Simard, O.

PY - 2012/6/1

Y1 - 2012/6/1

N2 - In models of anomaly-mediated supersymmetry breaking (AMSB), the lightest chargino is predicted to have a lifetime long enough to be detected in collider experiments. This letter explores AMSB scenarios in pp collisions at (Formula Presented) = 7 TeV by attempting to identify decaying charginos which result in tracks that appear to have few associated hits in the outer region of the tracking system. The search was based on data corresponding to an integrated luminosity of 1.02 fb− 1collected with the ATLAS detector in 2011. The pT spectrum of candidate tracks is found to be consistent with the expectation from Standard Model background processes and constraints on the lifetime and the production cross section were obtained. In the minimal AMSB framework with m3/2< 32 TeV, m0< 1.5 TeV, tanβ = 5 and μ > 0, a chargino having mass below 92 GeV and a lifetime between 0.5 ns and 2 ns is excluded at 95 % confidence level.

AB - In models of anomaly-mediated supersymmetry breaking (AMSB), the lightest chargino is predicted to have a lifetime long enough to be detected in collider experiments. This letter explores AMSB scenarios in pp collisions at (Formula Presented) = 7 TeV by attempting to identify decaying charginos which result in tracks that appear to have few associated hits in the outer region of the tracking system. The search was based on data corresponding to an integrated luminosity of 1.02 fb− 1collected with the ATLAS detector in 2011. The pT spectrum of candidate tracks is found to be consistent with the expectation from Standard Model background processes and constraints on the lifetime and the production cross section were obtained. In the minimal AMSB framework with m3/2< 32 TeV, m0< 1.5 TeV, tanβ = 5 and μ > 0, a chargino having mass below 92 GeV and a lifetime between 0.5 ns and 2 ns is excluded at 95 % confidence level.

U2 - 10.1140/epjc/s10052-012-1993-2

DO - 10.1140/epjc/s10052-012-1993-2

M3 - Article

AN - SCOPUS:84862283979

SN - 1434-6044

VL - 72

SP - 1

EP - 20

JO - European Physical Journal C

JF - European Physical Journal C

IS - 4

M1 - 1993

ER -

Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s=7 TeV

Abstract

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