Measurement of the top quark mass in the all- jets final state at √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 √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 35.9 fb - 1 of LHC proton-proton collision data collected with the CMS detector at s = 13 TeV . 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 m t = 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.

Item Type: Article
Uncontrolled Keywords: CMS Collaboration
Depositing User: Symplectic Admin
Date Deposited: 08 May 2019 09:05
Last Modified: 24 Jan 2024 13:16
DOI: 10.1140/epjc/s10052-019-6788-2
Open Access URL: https://doi.org/10.1140/epjc/s10052-019-6788-2
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3040215