Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/101939
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Type: Journal article
Title: Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at √s =7 TeV
Other Titles: Search for anomaly-mediated supersymmetry breaking with the ATLAS detector based on a disappearing-track signature in pp collisions at root s =7 TeV
Author: Aad, G.
ATLAS Collaboration
Citation: The European Physical Journal C, 2012; 72(4):1993-1-1993-20
Publisher: Springer
Issue Date: 2012
ISSN: 1434-6044
1434-6052
Statement of
Responsibility: 
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M.J. White ... et al. (ATLAS Collaboration)
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 pτ 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.
Rights: © CERN for the benefit of the ATLAS collaboration 2012. This article is published with open access at Springerlink.com. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
RMID: 0020132705
DOI: 10.1140/epjc/s10052-012-1993-2
Appears in Collections:Physics publications

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