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ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s=13 TeV

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    SYSNO ASEP0520900
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s=13 TeV
    Author(s) Aad, G. (FR)
    Abbott, B. (US)
    Abbott, D.C. (US)
    Chudoba, Jiří (FZU-D) RID
    Hejbal, Jiří (FZU-D) RID
    Hladík, Ondřej (FZU-D)
    Jačka, Petr (FZU-D)
    Jakoubek, Tomáš (FZU-D) RID
    Kepka, Oldřich (FZU-D) RID
    Kroll, Jiří (FZU-D)
    Kupčo, Alexander (FZU-D) RID
    Lokajíček, Miloš (FZU-D) RID
    Lysák, Roman (FZU-D) RID
    Marčišovský, Michal (FZU-D) RID
    Mikeštíková, Marcela (FZU-D) RID, ORCID
    Němeček, Stanislav (FZU-D) RID
    Penc, Ondřej (FZU-D)
    Šícho, Petr (FZU-D) RID
    Staroba, Pavel (FZU-D) RID
    Svatoš, Michal (FZU-D) RID, ORCID
    Taševský, Marek (FZU-D) RID, ORCID
    Number of authors2911
    Article number970
    Source TitleEuropean Physical Journal C - ISSN 1434-6044
    Roč. 79, č. 11 (2019), s. 1-36
    Number of pages36 s.
    Languageeng - English
    CountryDE - Germany
    KeywordsATLAS ; CERN LHC Coll ; topology ; statistical analysis ; data analysis method ; numerical calculations: Monte Carlo ; experimental results ; 13000 GeV-cms
    Subject RIVBF - Elementary Particles and High Energy Physics
    OBOR OECDParticles and field physics
    R&D ProjectsLM2015058 GA MŠk - Ministry of Education, Youth and Sports (MEYS)
    Způsob publikováníOpen access
    Institutional supportFZU-D - RVO:68378271
    UT WOS000505550300004
    EID SCOPUS85075996723
    AnnotationThe 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.
    WorkplaceInstitute of Physics
    ContactEva Pulcmanová,, Tel.: 220 318 579 ; Kristina Potocká,
    Year of Publishing2020
    Electronic address
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