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

Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Dragicevic, M, Eroe, J, Del Valle, A Escalante
et al (show 2274 more authors) (2019) Measurement of the top quark mass in the all- jets final state at root s=13 TeV and combination with the lepton plus jets channel. EUROPEAN PHYSICAL JOURNAL C, 79 (4). 313-.

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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 tt¯ all-jets final state. A kinematic fit is performed to reconstruct the decay of the tt¯  system and suppress the multijet background. Using the ideogram method, the top quark mass ( mt ) 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 tt¯ lepton+jets and all-jets final states is presented, using the same mass extraction method, and provides an mt measurement of 172.26±0.07(stat+JSF)±0.61(syst)GeV . This is the first combined mt extraction from the lepton+jets and all-jets channels through a single likelihood function.

Item Type: Article CMS Collaboration Symplectic Admin 08 May 2019 09:05 19 Jan 2023 00:49 10.1140/epjc/s10052-019-6788-2 https://doi.org/10.1140/epjc/s10052-019-6788-2 https://livrepository.liverpool.ac.uk/id/eprint/3040215