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

Authors

A. Tumasyan, CMS Collaboration

Date of this Version

9-16-2023

Citation

Eur. Phys. J. C (2023) 83:963 https://doi.org/10.1140/epjc/s10052-023-12050-4

Comments

Open access.

Abstract

The mass of the top quark is measured in 36.3 fb⁻¹ of LHC proton–proton collision data collected with the CMS detector at √ s = 13 TeV. 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 ± 0.37 GeV. This approach significantly improves the precision over previous measurements.