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Search for decays of stopped, long-lived particles from 7 TeV pp collisions with the ATLAS detector

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  • The ATLAS collaboration
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Article number1965
<mark>Journal publication date</mark>04/2012
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number4
Volume72
Number of pages21
Publication statusPublished
Original languageEnglish

Abstract

New metastable massive particles with electric and colour charge are features of many theories beyond the Standard Model. A search is performed for long-lived gluino-based R-hadrons with the ATLAS detector at the LHC using a data sample corresponding to an integrated luminosity of 31 pb−1. We search for evidence of particles that have come to rest in the ATLAS detector and decay at some later time during the periods in the LHC bunch structure without proton–proton collisions. No significant deviations from the expected backgrounds are observed, and a cross-section limit is set. It can be interpreted as excluding gluino-based R-hadrons with masses less than 341 GeV at the 95 % C.L., for lifetimes from 10−5 to 103 seconds and a neutralino mass of 100 GeV.

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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.