ATLAS b -jet identification performance and efficiency measurement with with t(t)over-bar events in pp collisions at √s=13 TeV

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...

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Hauptverfasser: Aad, Georges (VerfasserIn) , Anders, Christoph (VerfasserIn) , Andrei, George Victor (VerfasserIn) , Antel, Claire (VerfasserIn) , Bolz, Arthur (VerfasserIn) , Dunford, Monica (VerfasserIn) , Ferreira de Lima, Danilo Enoque (VerfasserIn) , Franchino, Silvia (VerfasserIn) , Geisler, Manuel Patrice (VerfasserIn) , Helary, Louis (VerfasserIn) , Jongmanns, Jan (VerfasserIn) , Klassen, Martin (VerfasserIn) , Kolb, Mathis (VerfasserIn) , Krishnan, Anjali (VerfasserIn) , Kugel, Andreas (VerfasserIn) , Lisovyi, Mykhailo (VerfasserIn) , Meyer zu Theenhausen, Hanno (VerfasserIn) , Napolitano, Fabrizio (VerfasserIn) , Ott, Philipp (VerfasserIn) , S̜ahinsoy, Merve (VerfasserIn) , Schöning, André (VerfasserIn) , Schultz-Coulon, Hans-Christian (VerfasserIn) , Spieker, Thomas (VerfasserIn) , Stamen, Rainer (VerfasserIn) , Starovoitov, Pavel (VerfasserIn) , Suchek, Stanislav (VerfasserIn) , Vigani, Luigi (VerfasserIn) , Wang, Jike (VerfasserIn) , Weber, Sebastian (VerfasserIn) , Wessels, Martin (VerfasserIn) , Yue, Xiaoguang (VerfasserIn)
Körperschaft: ATLAS Collaboration (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 25 November 2019
In: The European physical journal. C, Particles and fields
Year: 2019, Jahrgang: 79, Heft: 11
ISSN:1434-6052
DOI:10.1140/epjc/s10052-019-7450-8
Online-Zugang:Verlag, Volltext: https://doi.org/10.1140/epjc/s10052-019-7450-8
Verlag, Volltext: https://link.springer.com/article/10.1140/epjc/s10052-019-7450-8
Volltext
Verfasserangaben:The ATLAS Collaboration. G. Aad [und weitere]

MARC

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245 1 0 |a ATLAS b -jet identification performance and efficiency measurement with with t(t)over-bar events in pp collisions at √s=13 TeV  |c The ATLAS Collaboration. G. Aad [und weitere] 
246 3 0 |a sqrt 
246 3 3 |a ATLAS b -jet identification performance and efficiency measurement with with t(t)over-bar events in pp collisions at square root s=13 TeV 
264 1 |c 25 November 2019 
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500 |a The ATLAS Collaboration: C. Anders, V. Andrei, C. Antel, A. Bolz, M. Dunford, D.E. Ferreira de Lima, S. Franchino, M.P. Geisler, L. Herlay [und weitere] 
500 |a Gesehen am 13.02.2020 
520 |a 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 $$t{\bar{t}}$$tt¯ events. The topology of the   |t \rightarrow W b$$t→Wb decays is exploited to simultaneously measure both the jet flavour composition of the sample and the efficiency in a transverse momentum range from 20 to 600 GeV. The efficiency measurement is subsequently compared with that predicted by the simulation. The data used in this measurement, corresponding to a total integrated luminosity of 80.5 $$\hbox {fb}^{-1}$$fb-1, were collected in proton-proton collisions during the years 2015-2017 at a centre-of-mass energy $$\sqrt{s}=$$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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SRT |a ATLASCOLLAATLASBJETI2520