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

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 10^3 seconds and a neutralino mass of 100 GeV.

9 pages plus author list (23 pages total), 4 figures, 4 tables, revised author list, matches Eur. Phys. J. C version

References in corpus (8)

• PYTHIA 6.4 Physics and Manual
• Performance of the ATLAS Trigger System in 2010
• Stable Massive Particles at Colliders
• Interactions of Coloured Heavy Stable Particles in Matter
• Search for stopped gluinos from p-pbar collisions at sqrt(s)=1.96 TeV
• Gravitons and Dark Matter in Universal Extra Dimensions
• Interactions of Heavy Hadrons using Regge Phenomenology and the Quark Gluon String Model
• Model Independent Analysis of the Forward-Backward Asymmetry for the $B\to K_1{\mu }^{+}{\mu }^{-}$ Decay

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