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| Título: | Search for long-lived particles in events with photons and missing energy in proton-proton collisions at √s=7 TeV |
Autor: | Chatrchyan, S.; Brochero Cifuentes, J. A. CSIC ORCID; Cabrillo, I. J. CSIC ORCID ; Calderon, Alicia ; Chuang, S. H. CSIC; Duarte Campderros, J. CSIC ORCID ; Felcini, Marta CSIC ORCID; Fernández-García, Marcos CSIC ORCID ; Gómez, Gervasio CSIC ORCID ; González Sánchez, J. CSIC ; Graziano, A. CSIC; Jorda, C. CSIC; López Virto, A. CSIC ORCID ; Marco, Jesús CSIC ORCID ; Marco, Rafael CSIC; Martínez-Rivero, Celso CSIC ORCID ; Matorras, Francisco CSIC ORCID ; Muñoz Sánchez, F. J. CSIC ORCID; Rodrigo, Teresa CSIC ORCID ; Rodríguez Marrero, Ana Y. CSIC; Ruiz Jimeno, Alberto CSIC ORCID ; Scodellaro, Luca CSIC ORCID ; Vila, Iván CSIC ORCID; Vilar Cortabitarte, R. CSIC ORCID; CMS Collaboration | Fecha de publicación: | 2013 | Editor: | Elsevier | Citación: | Physics Letters B 722(4-5): 273-294 (2013) | Resumen: | Results are presented from a search for long-lived neutralinos decaying into a photon and an invisible particle, a signature associated with gauge-mediated supersymmetry breaking in supersymmetric models. The analysis is based on a 4.9 fb−1 sample of proton–proton collisions at √s = 7 TeV, collected with the CMS detector at the LHC. The missing transverse energy and the time of arrival of the photon at the electromagnetic calorimeter are used to search for an excess of events over the expected background. No significant excess is observed, and lower limits at the 95% confidence level are obtained on the mass of the lightest neutralino, m > 220 GeV (for cτ < 500 mm), as well as on the proper decay length of the lightest neutralino, cτ > 6000 mm (for m < 150 GeV). | Descripción: | This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0.-- et al. | Versión del editor: | http://dx.doi.org/10.1016/j.physletb.2013.04.027 | URI: | http://hdl.handle.net/10261/109720 | DOI: | 10.1016/j.physletb.2013.04.027 | Identificadores: | doi: 10.1016/j.physletb.2013.04.027 issn: 0370-2693 |
| Aparece en las colecciones: | (IFCA) Artículos |
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| Search for long-lived particles in events with photons.pdf | 818,51 kB | Adobe PDF |  Visualizar/Abrir |
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