Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/53049
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Título : Search for stopped long-lived particles produced in pp collisions at √s=7 TeV
Autor : Chatrchyan, S., Brochero Cifuentes, J. A., Cabrillo, I. J., Calderón, A., Chuang, S. H., Duarte Campderros, J., Felcini, M., Fernández, M., Gómez, G., González Sánchez, J., Jorda, C., López Virto, A., Marco, Jesús, Marco, Rafael, Martínez-Rivero, Celso, Matorras, Francisco, Muñoz Sánchez, F. J., Rodrigo, Teresa, Rodriguez Marrero, Ana Y., Ruiz Jimeno, Alberto, Scodellaro, Luca, Sobron Sañudo, M., Vila, Iván, Vilar, Rocío, CMS collaboration
Fecha de publicación : 2012
Editor: Springer
Citación : Journal of High Energy Physics: 26 (2012)
Resumen: 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.
Descripción : 31 páginas, 5 figuras, 3 tablas.-- CMS Collaboration: et al.-- Open Access: This article is distributed under the terms of the Creative Commons Attribution License.
Versión del editor: http://dx.doi.org/10.1007/JHEP08(2012)026
URI : http://hdl.handle.net/10261/53049
DOI: 10.1007/JHEP08(2012)026
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