Search for Stopped Gluinos in pp Collisions at sqrt[s]=7 TeV.
Phys Rev Lett 106(1):011801 (2011) PMID 21231732
The results of the first search for long-lived gluinos produced in 7 TeV pp collisions at the CERN Large Hadron Collider are presented. The search looks for evidence of long-lived particles that stop in the CMS detector and decay in the quiescent periods between beam crossings. In a dataset with a peak instantaneous luminosity of 1×10^{32} cm^{-2} s^{-1}, an integrated luminosity of 10 pb^{-1}, and a search interval corresponding to 62 hours of LHC operation, no significant excess above background was observed. Limits at the 95% confidence level on gluino pair production over 13 orders of magnitude of gluino lifetime are set. For a mass difference m_{g[over ˜]}-m_{χ[over ˜]_{1}^{0}}>100 GeV/c^{2}, and assuming BR(g[over ˜]→gχ[over ˜]_{1}^{0})=100%, m_{g[over ˜]}<370 GeV/c^{2} are excluded for lifetimes from 10 μs to 1000 s.
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