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

The ATLAS collaboration

Research output: Contribution to journalLetterpeer-review

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 10−5to 103seconds and a neutralino mass of 100 GeV.

Original languageEnglish (US)
Article number1965
Pages (from-to)1-21
Number of pages21
JournalEuropean Physical Journal C
Volume72
Issue number4
DOIs
StatePublished - 2012

ASJC Scopus subject areas

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

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