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 þ 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+- 0.19stat +- 1.22syst 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 þ 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 t¯ t production.
Measurement of the top quark mass using proton-proton data at √s=7 and 8 TeV
Sola, V.;AMAPANE, Nicola Carlo;ARGIRO', Stefano;BELLAN, Riccardo;COSTA, Marco;COVARELLI, Roberto;MIGLIORE, Ernesto;MONACO, Vincenzo;OBERTINO, Maria Margherita;ROMERO, Alessandra;SACCHI, Roberto;SOLANO, Ada Maria;
2016-01-01
Abstract
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 þ 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+- 0.19stat +- 1.22syst 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 þ 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 t¯ t production.File | Dimensione | Formato | |
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