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Measurements of the tt¯ charge asymmetry using the dilepton decay channel in pp collisions at vs = 7 TeV

Abstract: The tt¯ charge asymmetry in proton-proton collisions at vs = 7 TeV is measured using the dilepton decay channel (ee, eµ, or µµ). The data correspond to a total integrated luminosity of 5.0 fb-1, collected by the CMS experiment at the LHC. The tt and lepton charge asymmetries, defined as the differences in absolute values of the rapidities between the reconstructed top quarks and antiquarks and of the pseudorapidities between the positive and negative leptons, respectively, are measured to be AC = -0.010 ± 0.017 (stat.) ± 0.008 (syst.) and A(lep,C) = 0.009 ± 0.010 (stat.) ± 0.006 (syst.). The lepton charge asymmetry is also measured as a function of the invariant mass, rapidity, and transverse momentum of the tt¯ system. All measurements are consistent with the expectations of the standard model.

 Fuente: Journal of High Energy Physics, Vol. 2014, Num. 4, Art. Num. 191

 Editorial: Springer Verlag

 Fecha de publicación: 01/04/2014

 Nº de páginas: 35

 Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP04(2014)191

 ISSN: 1126-6708,1029-8479

 Proyecto español: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

 Url de la publicación: https://doi.org/10.1007/JHEP04(2014)191

Autoría

CHATRCHYAN, SERGUEI

JAVIER ANDRES BROCHERO CIFUENTES

MARCOS FERNANDEZ GARCIA

ALBERTO GRAZIANO

MARIA AMPARO LOPEZ VIRTO

RAFAEL JOSE MARCO DE LUCAS

FRANCISCA JAVIELA MUÑOZ SANCHEZ

ANA YAIZA RODRIGUEZ MARRERO