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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.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 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