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}hspace{-.08em}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 171.77pm 0.37,text {Ge}hspace{-.08em}text {V} . This approach significantly improves the precision over previous measurements.
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