Anders, J.K.; Beck, H.P.; Ereditato, A.; Franconi, L.; Haug, S.; Ilg, A.; Miucci, A.; Weber, M.S.; Weston, T.D. (2023). Measurement of the top-quark mass using a leptonic invariant mass in pp collisions at √s=13 TeV with the ATLAS detector. Journal of High Energy Physics, 06 Springer 10.1007/JHEP06(2023)019
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A measurement of the top-quark mass (mt) in the t¯t → lepton + jets channel is presented, with an experimental technique which exploits semileptonic decays of b-hadrons produced in the top-quark decay chain. The distribution of the invariant mass m`μ of the lepton, ` (with ` = e, μ), from the W -boson decay and the muon, μ, originating from the b-hadron decay is reconstructed, and a binned-template profile likelihood fit is performed to extract mt. The measurement is based on data corresponding to an integrated luminosity of 36.1 fb−1 of √s = 13 TeV pp collisions provided by the Large Hadron Collider and recorded by the ATLAS detector. The measured value of the top-quark mass is mt = 174.41 ± 0.39 (stat.) ± 0.66 (syst.) ± 0.25 (recoil) GeV , where the third uncertainty arises from changing the Pythia8 parton shower gluon-recoil scheme, used in top-quark decays, to a recently developed setup.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Anders, John Kenneth, Beck, Hans Peter, Ereditato, Antonio, Franconi, Laura, Haug, Sigve, Ilg, Armin, Miucci, Antonio, Weber, Michele, Weston, Thomas Daniel |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1029-8479 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
08 Feb 2024 16:13 |
Last Modified: |
08 Feb 2024 16:21 |
Publisher DOI: |
10.1007/JHEP06(2023)019 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autor*innen namentlich erwaehnt; the ATLAS collaboration |
Uncontrolled Keywords: |
Hadron-Hadron Scattering , Top Physics |
BORIS DOI: |
10.48350/191901 |
URI: |
https://boris.unibe.ch/id/eprint/191901 |
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