Naslov
Measurements of the t¯t charge asymmetry using the dilepton decay channel in pp collisions at √s = 7 TeV

Autori
Chatrchyan, S. ; ... ; Godinović, Nikola ; Lelas, Damir ; Pleština, Roko ; Polić, Dunja ; Puljak, Ivica ; Antunović, Željko ; Kovač, Marko ; Brigljević, Vuko ; Đurić, Senka ; Kadija, Krešo ; Luetić, Jelena ; Mekterović, Darko ; Morović, Srećko ; Tikvica, Lucija ; ... ; Woods, N.

Izvornik
Journal of High Energy Physics (1029-8479) 1404 (2014); 191-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Hadron-Hadron Scattering ; Top physics

Sažetak
The t¯t charge asymmetry in proton-proton collisions at √ s = 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 t¯t 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 t¯t system. All measurements are consistent with the expectations of the standard model.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA