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

The ATLAS collaboration

    Research output: Contribution to journalArticle

    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.

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

    Fingerprint

    Hadrons
    hadrons
    Protons
    Detectors
    collisions
    protons
    detectors
    decay
    electric charge
    Luminance
    luminosity
    Color
    deviation
    color
    life (durability)
    cross sections

    ASJC Scopus subject areas

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

    Cite this

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

    In: European Physical Journal C, Vol. 72, No. 4, 04.2012, p. 1-21.

    Research output: Contribution to journalArticle

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    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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