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Searches for heavy long-lived sleptons and R-hadrons with the ATLAS detector in pp collisions at √s=7 TeV
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ATLAS Collaboration (Including: Farrington, Sinead and Jones, G. (Graham)). (2013) Searches for heavy long-lived sleptons and R-hadrons with the ATLAS detector in pp collisions at √s=7 TeV. Physics Letters B, Volume 720 (Number 4-5). pp. 277-308. doi:10.1016/j.physletb.2013.02.015 ISSN 0370-2693.
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WRAP_Jones_1-s2.0-S0370269313001445-main.pdf - Published Version Available under License Creative Commons Attribution. Download (3361Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.physletb.2013.02.015
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 tan β = 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.
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