Searches for heavy long-lived sleptons and R-hadrons with the ATLAS detector in pp collisions at √s=7 TeV

ATLAS Collaboration

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    54 Citations (Scopus)

    Abstract

    A search for long-lived particles is performed using a data sample of 4.7 fb−1 from proton–proton collisions at a centre-of-mass energy s=7 TeV collected by the ATLAS detector at the LHC. No excess is observed above the estimated background and lower limits, at 95% confidence level, are set on the mass of the long-lived particles in different scenarios, based on their possible interactions in the inner detector, the calorimeters and the muon spectrometer. Long-lived staus in gauge-mediated SUSY-breaking models are excluded up to a mass of 300 GeV for tanβ=5–20. Directly produced long-lived sleptons are excluded up to a mass of 278 GeV. R-hadrons, composites of gluino (stop, sbottom) and light quarks, are excluded up to a mass of 985 GeV (683 GeV, 612 GeV) when using a generic interaction model. Additionally two sets of limits on R-hadrons are obtained that are less sensitive to the interaction model for R-hadrons. One set of limits is obtained using only the inner detector and calorimeter observables, and a second set of limits is obtained based on the inner detector alone.

    Original languageEnglish
    Pages (from-to)277-308
    Number of pages32
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume720
    Issue number4-5
    DOIs
    Publication statusPublished - 2013 Mar 26

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    Keywords

    • ATLAS
    • GMSB
    • LHC
    • Long-lived
    • R-hadron
    • Slepton

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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