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.

Sirunyan A.M., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., et al. (2019). Measurement of the top quark mass in the all-jets final state at √s=13TeV and combination with the lepton+jets channel. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 79(4), 1-27 [10.1140/epjc/s10052-019-6788-2].

Measurement of the top quark mass in the all-jets final state at √s=13TeV and combination with the lepton+jets channel

Battilana C.;Bonacorsi D.;Borgonovi L.;Braibant-Giacomelli S.;Castro A.;Cuffiani M.;Fanfani A.;Fontanesi E.;Guiducci L.;Iemmi F.;Primavera F.;Rovelli T.;Siroli G. P.;
2019

Abstract

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.
2019
Sirunyan A.M., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., et al. (2019). Measurement of the top quark mass in the all-jets final state at √s=13TeV and combination with the lepton+jets channel. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 79(4), 1-27 [10.1140/epjc/s10052-019-6788-2].
Sirunyan A.M.; Tumasyan A.; Adam W.; Ambrogi F.; Asilar E.; Bergauer T.; Brandstetter J.; Dragicevic M.; Ero J.; Del Valle A.E.; Flechl M.; Fruhwirth ...espandi
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