Measurement of the Top Quark Mass in the All-Jets Final State at √s = 13 TeV and Combination with the Lepton+Jets Channel

European Physical Journal C 2019
Viesturs Veckalns, et al 100

A top quark mass measurement is performed using 35.9fb-1 of LHC proton–proton collision data collected with the CMS detector at s=13TeV. The measurement uses the t t ¯ all-jets final state. A kinematic fit is performed to reconstruct the decay of the t t ¯ system and suppress the multijet background. Using the ideogram method, the top quark mass (m t ) is determined, simultaneously constraining an additional jet energy scale factor (JSF). The resulting value of mt=172.34±0.20(stat+JSF)±0.70(syst)GeV is in good agreement with previous measurements. In addition, a combined measurement that uses the t t ¯ lepton+jets and all-jets final states is presented, using the same mass extraction method, and provides an m t measurement of 172.26±0.07(stat+JSF)±0.61(syst)GeV. This is the first combined m t extraction from the lepton+jets and all-jets channels through a single likelihood function.

DOI
10.1140/epjc/s10052-019-6788-2
Hyperlink
https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-019-6788-2

Veckalns, V., 100, e. Measurement of the Top Quark Mass in the All-Jets Final State at √s = 13 TeV and Combination with the Lepton+Jets Channel. European Physical Journal C, 2019, Vol. 79, No. 4, pp.1-10. ISSN 1434-6044. e-ISSN 1434-6052. Available from: doi:10.1140/epjc/s10052-019-6788-2

Publication language
English (en)