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, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (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). pp. 1-27. ISSN 1434-6044 E-ISSN 1434-6052

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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 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.

Item Type:	Article (Journal)
Additional Information:	7861/79893
Uncontrolled Keywords:	Measurement of the top quark mass; All-jets final state at √s = 13 TeV; Lepton+jets channel
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	01 Jul 2020 12:06
Last Modified:	01 Jul 2020 12:06
URI:	http://irep.iium.edu.my/id/eprint/79893

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