Measurement of the top quark mass with lepton+jets final states using p p collisions at √s=13TeV

TLDR: The mass of the top quark was measured using a sample of events collected by the CMS detector using proton-proton collisions at the CERN LHC as discussed by the authors, and no indications of a bias in the measurements are observed.

Abstract: The mass of the top quark is measured using a sample of $${{\text {t}}\overline{{\text {t}}}}$$ events collected by the CMS detector using proton-proton collisions at $$\sqrt{s}=13$$ $$\,\text {TeV}$$ at the CERN LHC. Events are selected with one isolated muon or electron and at least four jets from data corresponding to an integrated luminosity of 35.9 $$\,\text {fb}^{-1}$$ . For each event the mass is reconstructed from a kinematic fit of the decay products to a $${{\text {t}}\overline{{\text {t}}}}$$ hypothesis. Using the ideogram method, the top quark mass is determined simultaneously with an overall jet energy scale factor (JSF), constrained by the mass of the W boson in $${\text {q}} \overline{{\text {q}}} ^\prime $$ decays. The measurement is calibrated on samples simulated at next-to-leading order matched to a leading-order parton shower. The top quark mass is found to be $$172.25 \pm 0.08\,\text {(stat+JSF)} \pm 0.62\,\text {(syst)} \,\text {GeV} $$ . The dependence of this result on the kinematic properties of the event is studied and compared to predictions of different models of $${{\text {t}}\overline{{\text {t}}}}$$ production, and no indications of a bias in the measurements are observed.