2024-03-29T08:54:53Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/520032018-06-28T07:30:06Zcom_10261_37com_10261_4col_10261_290
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Chatrchyan, S.
author
Brochero Cifuentes, J. A.
author
Cabrillo, I. J.
author
Calderon, Alicia
author
Chuang, S. H.
author
Duarte Campderros, J.
author
Felcini, Marta
author
Fernández, M.
author
Gómez, G.
author
González Sánchez, J.
author
Jorda, C.
author
Lobelle Pardo, P.
author
López Virto, A.
author
Marco, Rafael
author
Marco, Jesús
author
Martínez-Rivero, Celso
author
Martínez-Rivero, Celso
author
Matorras, Francisco
author
Muñoz Sánchez, F. J.
author
Piedra, Jonatan
author
Rodrigo, Teresa
author
Rodríguez Marrero, Ana Y.
author
Ruiz Jimeno, Alberto
author
Scodellaro, Luca
author
Sobron Sañudo, M.
author
Vila, Iván
author
Vilar, Rocío
author
2011
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.
Physical Review D 84(11): 112002 (2011)
0556-2821
http://hdl.handle.net/10261/52003
10.1103/PhysRevD.84.112002
Measurement of the weak mixing angle with the Drell-Yan process in proton-proton collisions at the LHC