Compact Muon Solenoid
LHC, CERN
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| CMS-EXO-11-020 ; CERN-PH-EP-2012-170 | ||
| Search for stopped long-lived particles produced in pp collisions at $\sqrt{s}$ =7 TeV | ||
| CMS Collaboration | ||
| 30 June 2012 | ||
| J. High Energy Phys. 08 (2012) 026 | ||
| Abstract: A search has been performed for long-lived particles that have stopped in the CMS detector, during 7 TeV proton-proton operations of the CERN LHC. The existence of such particles could be inferred from observation of their decays when there were no proton-proton collisions in the CMS detector, namely during gaps between LHC beam crossings. Using a data set in which CMS recorded an integrated luminosity of 4.0 inverse femtobarns, and a search interval corresponding to 246 hours of trigger live time, 12 events are observed, with a mean background prediction of 8.6+/-2.4 events. Limits are presented at 95% confidence level on long-lived gluino and stop production, over 13 orders of magnitude of particle lifetime. Assuming the "cloud model" of R-hadron interactions, a gluino with mass below 640 GeV and a stop with mass below 340 GeV are excluded, for lifetimes between 10 microseconds and 1000 seconds. | ||
| Links: e-print arXiv:1207.0106 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; | ||
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Compact Muon Solenoid LHC, CERN |
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