Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/45799
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Título : A search for excited leptons in pp Collisions at sqrt(s) = 7 TeV
Autor : 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., Lobelle Pardo, P., López Virto, A., Marco, Jesús, Marco, Rafael, Martínez-Rivero, Celso, Matorras, Francisco, Muñoz Sánchez, F. J., Piedra, Jonatan, Rodrigo, Teresa, Rodriguez Marrero, Ana Y., Ruiz Jimeno, Alberto, Scodellaro, Luca, Sobron Sañudo, M., Vila, Iván, Vilar, Rocío
Palabras clave : CMS
Physics
Fecha de publicación : Oct-2011
Editor: Elsevier
Citación : Physics Letters B 704(3): 143-162 (2011)
Resumen: A search for excited leptons is carried out with the CMS detector at the LHC, using 36 inverse picobarns of pp collision data recorded at sqrt(s) = 7 TeV. The search is performed for associated production of a lepton and an oppositely charged excited lepton pp to l l*, followed by the decay l* to l gamma, resulting in the l l gamma final state, where l = electron or muon. No excess of events above the standard model expectation is observed. Interpreting the findings in the context of l* production through four-fermion contact interactions and subsequent decay via electroweak processes, first upper limits are reported for l* production at this collision energy. The exclusion region in the compositeness scale Lambda and excited lepton mass M(l*) parameter space is extended beyond previously established limits. For Lambda = M(l*), excited lepton masses are excluded below 1070 GeV/c^2 for e* and 1090 GeV/c^2 for mu* at the 95% confidence level.
Descripción : 20 páginas, 2 figuras, 2 tablas.-- This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0.-- CMS Collaboration: et al.
Versión del editor: http://dx.doi.org/10.1016/j.physletb.2011.09.021
URI : http://hdl.handle.net/10261/45799
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2011.09.021
Citación : Physics Letters B 704(3): 143-162 (2011)
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