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| Título: | Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC |
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, Rafael CSIC; Marco, Jesús CSIC ORCID ; Martínez-Rivero, Celso CSIC ORCID ; 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: | 2011 | Editor: | American Physical Society | Citación: | Physical Review D 84(11): 112002 (2011) | Resumen: | A multivariate likelihood method to measure electroweak couplings with the Drell–Yan process at the LHC is presented. The process is described by the dilepton rapidity, invariant mass, and decay angle distributions. The decay angle ambiguity due to the unknown assignment of the scattered constituent quark and antiquark to the two protons in a collision is resolved statistically using correlations between the observables. The method is applied to a sample of dimuon events from proton-proton collisions at √s=7 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 1.1 fb-1. From the dominant uu̅ , dd̅ →γ*/Z→μ-μ+ process, the effective weak mixing angle parameter is measured to be sin2θeff=0.2287±0.0020 (stat.)±0.0025 (syst.). This result is consistent with measurements from other processes, as expected within the standard model. | Descripción: | 23 páginas, 9 figuras, 2 tablas.-- PACS numbers: 12.15. y, 13.88.+e, 14.70.-e.-- CMS Collaboration: et al. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevD.84.112002 | URI: | http://hdl.handle.net/10261/52003 | DOI: | 10.1103/PhysRevD.84.112002 | ISSN: | 0556-2821 |
| Aparece en las colecciones: | (IFCA) Artículos |
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| Fichero | Descripción | Tamaño | Formato | |
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| Measurement of the weak.pdf | 776,03 kB | Adobe PDF |  Visualizar/Abrir |
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