Search for stopped long-lived particles produced in pp collisions at √s=7TeV
Buchmann, Marco A.
Casal Laraña, Bruno
Marini, Andrea C.
Martinez Ruiz del Arbol, Pablo
Ronga, Frédéric J.
Weber, Hannsjörg A.
- Journal Article
Rights / licenseCreative Commons Attribution 4.0 International
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 fb−1, 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 μs and 1000 s Show more
Journal / seriesJournal of High Energy Physics
Pages / Article No.
Organisational unit03904 - Wallny, Rainer
03593 - Dissertori, Günther
03381 - Pauss, Felicitas (emeritus)
08803 - Grab, Christoph (Tit.Prof.)
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