Measurement of the top quark mass using a profile likelihood approach with the lepton + jets final states in proton-proton collisions at s=13TeV

Abstract

The mass of the top quark is measured in 36.3${\text{fb}}^{-1}$ of LHC proton-proton collision data collected with the CMS detector at $\sqrt{s}=13\text{Te}\text{V}$. The measurement uses a sample of top quark pair candidate events containing one isolated electron or muon and at least four jets in the final state. For each event, the mass is reconstructed from a kinematic fit of the decay products to a top quark pair hypothesis. A profile likelihood method is applied using up to four observables per event to extract the top quark mass. The top quark mass is measured to be $171.77\pm 0.37\text{Ge}\text{V}$. This approach significantly improves the precision over previous measurements.