Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s = 7 TeV
Name
Search for anomaly.pdf
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1.42 MB
Format
Adobe PDF
Checksum (MD5)
1ef39d3dda1ecdb5915f28b85c1da767
Author(s)
Taylor, Frank E
Date Issued
April 2012
Journal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
The ATLAS Collaboration et al. “Search for Anomaly-Mediated Supersymmetry Breaking with the ATLAS Detector Based on a Disappearing-Track Signature in Pp Collisions at √s = 7 TeV.” The European Physical Journal C 72.4 (2012): n. pag. © 2012 CERN for the benefit of the ATLAS collaboration
Version
Final published version
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[superscript −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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epjc/s10052-012-1993-2
