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Título: | Search for a Vectorlike Quark with Charge 2/3 in t+Z Events from pp 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 ; 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 | Fecha de publicación: | dic-2011 | Editor: | American Physical Society | Citación: | Physical Review Letters 107(27): 271802 (2011) | Resumen: | A search for pair-produced heavy vectorlike charge-2/3 quarks, T, in pp collisions at a center-of-mass energy of 7 TeV, is performed with the CMS detector at the LHC. Events consistent with the flavor-changing-neutral-current decay of a T quark to a top quark and a Z boson are selected by requiring two leptons from the Z-boson decay, as well as an additional isolated charged lepton. In a data sample corresponding to an integrated luminosity of 1.14 fb-1, the number of observed events is found to be consistent with the standard model background prediction. Assuming a branching fraction of 100% for the decay T→tZ, a T quark with a mass less than 475 GeV/c2 is excluded at the 95% confidence level. | Descripción: | 15 páginas, 2 figuras, 3 tablas.-- Creative Commons Attribution 3.0 License.-- CMS Collaboration: et al. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.107.271802 | URI: | http://hdl.handle.net/10261/46542 | DOI: | 10.1103/PhysRevLett.107.271802 | ISSN: | 0031-9007 | E-ISSN: | 1079-7114 |
Aparece en las colecciones: | (IFCA) Artículos |
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