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) |
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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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