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

Khachatryan, V. and Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Asilar, E. and Filipovic, Nicolas and Bencze, György and Hajdú, Csaba and Hidas, Pál and Horváth, Dezső and Siklér, Ferenc and Veszprémi, Viktor and Vesztergombi, György and Zsigmond, Anna Júlia and Karancsi, János and Molnár, József and Bartók, Márton and Makovec, Alajos and Trócsányi, Zoltán and Ujvári, Balázs and Veres, Gábor (2016) Measurement of the top quark mass using proton-proton data at (√s)=7 and 8 TeV. PHYSICAL REVIEW D, 93 (7). ISSN 2470-0010

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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 mea- sured 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 pub- lished 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 tt production.

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