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

    Research output: Contribution to journalArticle

    19 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 √S = 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-1 collected 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.

    Original languageEnglish
    Pages (from-to)1-20
    Number of pages20
    JournalEuropean Physical Journal C
    Volume72
    Issue number4
    DOIs
    Publication statusPublished - 2012 Apr

    Fingerprint

    Supersymmetry
    supersymmetry
    signatures
    anomalies
    Detectors
    life (durability)
    collisions
    detectors
    Colliding beam accelerators
    confidence
    Luminance
    luminosity
    cross sections
    Experiments

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)
    • Engineering (miscellaneous)

    Cite this

    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.

    In: European Physical Journal C, Vol. 72, No. 4, 04.2012, p. 1-20.

    Research output: Contribution to journalArticle

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    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 √S = 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-1 collected 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 M. Aliyev and Allport, {P. P.} and Kohei Yorita",
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