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

研究成果: Article査読

20 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号1993
ページ(範囲)1-20
ページ数20
ジャーナルEuropean Physical Journal C
72
4
DOI
出版ステータスPublished - 2012

ASJC Scopus subject areas

  • 工学(その他)
  • 物理学および天文学(その他)

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