Search for stopped gluinos in pp collisions at √s = 7 TeV

Abstract

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 1×1032 cm^-2s^-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^~-m_χ110>100 GeV/c², and assuming BR(g^~10)=100%, m_g^~>370 GeV/c² are excluded for lifetimes from 10 µs to 1000 s.