A search for long-lived gluinos with the CMS experiment during beam-off periods of the large hadron collider.

摘要

Many models of new physics include the possibility of a new massive long-lived particle, the existence of which could explain discrepancies between cosmological theories and observations of 6Li and 7Li in the early universe. We search for particles stopping in the CMS detector after production in 7 TeV collisions at the LHC. We look for decays using a specially modified jet trigger, in time periods in which no collisions occur in CMS. In a search interval corresponding to 62 hours of LHC operation, consisting of 10.2 pb-1 of integrated luminosity with a peak instantaneous luminosity of 1032cm-2s-1, we observe no significant excess over background. We set a 95% C.L. limit on production of Split-Supersymmetry gluinos over 14 orders of magnitude of gluino lifetime.