Data di Pubblicazione:
2011
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 10^{32} cm^{-2} s^{-1}, an integrated luminosity of 10 inverse picobarns, 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 between the gluino and the neutralino greater than 100 GeV/c^2, and assuming a branching ratio for gluino to gluon+neutralino of 100%, gluinos of mass less than 370 GeV/c^2 are excluded for lifetimes from 10 microseconds to 1000 s.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
gluino pair production; gluino lifetime; gluino mass; CERN LHC Coll; mass difference (gluino neutralino); channel cross section branching ratio; CMS; p p interaction; gluino; R-hadron decay; upper limit; experimental results; Monte Carlo; p p 2gluino anything; gluino gluon neutralino; 7000 GeV-cms
Elenco autori:
Baesso, PAOLO GIUSEPPE; Berzano, Umberto; Riccardi, Cristina; Torre, Paola; Vitulo, Paolo; Viviani, Claudio
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