Measurement of the top quark mass with lepton+jets final states in pp collisions at $\sqrt{s}=13\mathrm{TeV}$

Abstract

The mass of the top quark is measured using a sample of $\mathrm{t}\bar{\mathrm{t}}$ candidate events with one lepton, muon or electron, and at least four jets in the final state, collected by the CMS detector in pp collisions at $\sqrt{s}=13\mathrm{TeV}$ at the CERN LHC. The candidate events are selected from data corresponding to an integrated luminosity of $35.9{\mathrm{fb}}^{-1}$. For each event the mass is reconstructed from a kinematic fit of the decay products to a $\mathrm{t}\bar{\mathrm{t}}$ hypothesis. The top quark mass is determined simultaneously with an overall jet energy scale factor (JSF), constrained by the mass of the W boson in $\mathrm{q}\bar{\mathrm{q}}$ decays. The measurement is calibrated on samples simulated at next-to-leading order matched to parton shower. The top quark mass is found to be $172.25\pm 0.08(\mathrm{stat}+\mathrm{JSF})\pm 0.62(\mathrm{syst})\mathrm{GeV}$. The dependence of this result on event kinematical properties is studied and compared to predictions of different models of $\mathrm{t}\bar{\mathrm{t}}$ production.

7 pages, 5 figures

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