Measurement of the Top Quark Mass with Lepton+Jets Final States Using P P Collisions at √s=13TeV

European Physical Journal C 2018
Viesturs Veckalns, CERN international group of authors

The mass of the top quark is measured using a sample of t t ¯ events collected by the CMS detector using proton-proton collisions at s=13TeV 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 35.9fb-1. For each event the mass is reconstructed from a kinematic fit of the decay products to a t 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 q q ¯ ′ 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±0.08(stat+JSF)±0.62(syst)GeV. The dependence of this result on the kinematic properties of the event is studied and compared to predictions of different models of t t ¯ production, and no indications of a bias in the measurements are observed.

DOI
10.1140/epjc/s10052-018-6332-9
Hyperlink
https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-6332-9

Veckalns, V., international group of authors, C. Measurement of the Top Quark Mass with Lepton+Jets Final States Using P P Collisions at √s=13TeV. European Physical Journal C, 2018, Vol. 78, No. 1, pp.1-10. ISSN 1434-6044. e-ISSN 1434-6052. Available from: doi:10.1140/epjc/s10052-018-6332-9

Publication language
English (en)