Measurement of the differential t t ¯production cross section as a function of the jet mass and extraction of the top quark mass in hadronic decays of boosted top quarks
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Type :
Article
Publication Status :
Published
Access :
openAccess
Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/
Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/
Abstract
A measurement of the jet mass distribution in hadronic decays of Lorentz-boosted top quarks is presented. The measurement is performed in the lepton + jets channel of top quark pair production (t t ¯) events, where the lepton is an electron or muon. The products of the hadronic top quark decay are reconstructed using a single large-radius jet with transverse momentum greater than 400 GeV . The data were collected with the CMS detector at the LHC in proton-proton collisions and correspond to an integrated luminosity of 138 fb-1 . The differential t t ¯ production cross section as a function of the jet mass is unfolded to the particle level and is used to extract the top quark mass. The jet mass scale is calibrated using the hadronic W boson decay within the large-radius jet. The uncertainties in the modelling of the final state radiation are reduced by studying angular correlations in the jet substructure. These developments lead to a significant increase in precision, and a top quark mass of 173.06±0.84GeV .
Source :
European Physical Journal C
Date :
2023-07-03
Volume :
83
Issue :
7
Publisher :
Springer
URI
http://hdl.handle.net/10679/9197https://link.springer.com/article/10.1140/epjc/s10052-023-11587-8
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