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Título: | Search for resonances in the dilepton mass distribution in pp collisions at root s=7 TeV |
Autor: | Chatrchyan, S.; Brochero Cifuentes, J. A. CSIC ORCID; Cabrillo, I. J. 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 ; Jorda, C. CSIC; Lobelle Pardo, P. 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; Piedra, Jonatan CSIC ORCID ; Rodrigo, Teresa CSIC ORCID ; Rodríguez Marrero, Ana Y. CSIC; Ruiz Jimeno, Alberto CSIC ORCID ; Scodellaro, Luca CSIC ORCID ; Sobron Sañudo, M. CSIC; Vila, Iván CSIC ORCID; Vilar Cortabitarte, R. CSIC ORCID; CMS Collaboration | Fecha de publicación: | 2011 | Editor: | Springer Nature | Citación: | Journal of High Energy Physics 5: 93 (2011) | Resumen: | A search for narrow resonances at high mass in the dimuon and dielectron channels has been performed by the CMS experiment at the CERN LHC, using pp collision data recorded at ps = 7TeV. The event samples correspond to integrated luminosities of 40 pb−1 in the dimuon channel and 35 pb−1 in the dielectron channel. Heavy dilepton resonances are predicted in theoretical models with extra gauge bosons (Z′) or as Kaluza-Klein graviton excitations (GKK) in the Randall-Sundrum model. Upper limits on the inclusive cross section of Z′(GKK) -- ℓ+ℓ− relative to Z -- ℓ+ℓ− are presented. These limits exclude at 95% confidence level a Z′ with standard-model-like couplings below 1140 GeV, the superstring-inspired Z′ ψ below 887 GeV, and, for values of the coupling parameter k/MPl of 0.05 (0.1), Kaluza-Klein gravitons below 855 (1079) GeV. | URI: | http://hdl.handle.net/10261/52066 | DOI: | 10.1007/JHEP05(2011)093 | Identificadores: | doi: 10.1007/JHEP05(2011)093 e-issn: 1029-8479 |
Aparece en las colecciones: | (IFCA) Artículos |
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Fichero | Descripción | Tamaño | Formato | |
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Search for resonances in the dilepton.pdf | 381,87 kB | Adobe PDF | Visualizar/Abrir |
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