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Measurement of the top quark mass using proton-proton data at √ ( s ) = 7 and 8 TeV

par Khachatryan, Vardan;Barria, Patrizia ;Brun, Hugues ;Caillol, Cécile ;Clerbaux, Barbara ;De Lentdecker, Gilles ;Fasanella, Giuseppe ;Favart, Laurent ;Grebenyuk, Anastasia ;Karapostoli, Georgia ;Lenzi, Thomas ;Leonard, Alexandre ;Maerschalk, Thierry ;Marinov, Audrey ;Pernie, Luca ;Randle-Conde, Aidan Sean ;Reis, Thomas ;Seva, Tomislav ;Vander Velde, Catherine ;Vanlaer, Pascal ;Yonamine, Ryo ;Zenoni, Florian ;Zhang, Fengwangdong ; [et al.]
Référence Physical Review D, 93, 7, 072004
Publication Publié, 2016-04

Article révisé par les pairs

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Résumé :

A new set of measurements of the top quark mass are presented, based on the proton-proton data recorded by the CMS experiment at the LHC at s=8 TeV corresponding to a luminosity of 19.7 fb-1. The top quark mass is measured using the lepton+jets, all-jets and dilepton decay channels, giving values of 172.35±0.16(stat)±0.48(syst) GeV, 172.32±0.25(stat)±0.59(syst) GeV, and 172.82±0.19(stat)±1.22(syst) GeV, respectively. When combined with the published CMS results at s=7 TeV, they provide a top quark mass measurement of 172.44±0.13(stat)±0.47(syst) GeV. The top quark mass is also studied as a function of the event kinematical properties in the lepton+jets decay channel. No indications of a kinematic bias are observed and the collision data are consistent with a range of predictions from current theoretical models of ttproduction.