Anders, J. K.; Beck, H. P.; Chatterjee, M.; Ereditato, A,; Franconi, L.; Halser, L.; Haug, S.; Ilg, A.; Lehmann, N.; Mueller, R.; Weber, M. S. (2022). Measurement of the c-jet mistagging efficiency in tt¯ events using pp collision data at s√=13 TeV collected with the ATLAS detector. The European physical journal. C, Particles and fields, 82(1) Springer 10.1140/epjc/s10052-021-09843-w
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A technique is presented to measure the efficiency with which c-jets are mistagged as b-jets (mistagging efficiency) using tt¯ events, where one of the W bosons decays into an electron or muon and a neutrino and the other decays into a quark–antiquark pair. The measurement utilises the relatively large and known W→cs branching ratio, which allows a measurement to be made in an inclusive c-jet sample. The data sample used was collected by the ATLAS detector at s√=13 TeV and corresponds to an integrated luminosity of 139 fb−1. Events are reconstructed using a kinematic likelihood technique which selects the mapping between jets and tt¯ decay products that yields the highest likelihood value. The distribution of the b-tagging discriminant for jets from the hadronic W decays in data is compared with that in simulation to extract the mistagging efficiency as a function of jet transverse momentum. The total uncertainties are in the range 3–17%. The measurements generally agree with those in simulation but there are some differences in the region corresponding to the most stringent b-jet tagging requirement.
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, Chatterjee, Meghranjana, Ereditato, Antonio, Franconi, Laura, Halser, Lea, Haug, Sigve, Ilg, Armin, Lehmann, Niklaus, Müller, Roman, Weber, Michele |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1434-6044 |
Publisher: |
Springer |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
05 Apr 2023 09:34 |
Last Modified: |
13 Apr 2023 14:49 |
Publisher DOI: |
10.1140/epjc/s10052-021-09843-w |
Additional Information: |
Kollaboration - Es sind nur die Berner Autor*innen namentlich erwaehnt; ATLAS collaboration |
BORIS DOI: |
10.48350/181452 |
URI: |
https://boris.unibe.ch/id/eprint/181452 |
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