Publication: ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s=13 TeV
Дата
2019
Авторы
Aad, G.
Abbott, B.
Abbott, D. C.
Abud, A. A.
Belotskiy, K.
Belyaev, N. L.
Bulekov, O.
Kantserov, V. A.
Kurova, A.
Ponomarenko, D.
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Аннотация
© 2019, CERN for the benefit of the ATLAS collaboration.The algorithms used by the ATLAS Collaboration during Run 2 of the Large Hadron Collider to identify jets containing b-hadrons are presented. The performance of the algorithms is evaluated in the simulation and the efficiency with which these algorithms identify jets containing b-hadrons is measured in collision data. The measurement uses a likelihood-based method in a sample highly enriched in tt¯ events. The topology of the t→ Wb decays is exploited to simultaneously measure both the jet flavour composition of the sample and the efficiency in a transverse momentum range from 20 to 600 GeV. The efficiency measurement is subsequently compared with that predicted by the simulation. The data used in this measurement, corresponding to a total integrated luminosity of 80.5 fb - 1, were collected in proton–proton collisions during the years 2015–2017 at a centre-of-mass energy s= 13 TeV. By simultaneously extracting both the efficiency and jet flavour composition, this measurement significantly improves the precision compared to previous results, with uncertainties ranging from 1 to 8% depending on the jet transverse momentum.
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ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s=13 TeV / Aad, G. [et al.] // European Physical Journal C. - 2019. - 79. - № 11. - 10.1140/epjc/s10052-019-7450-8
URI
https://www.doi.org/10.1140/epjc/s10052-019-7450-8
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https://openrepository.mephi.ru/handle/123456789/18985
https://www.scopus.com/record/display.uri?eid=2-s2.0-85075996723&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000505550300004
https://openrepository.mephi.ru/handle/123456789/18985