Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/3320
 Title: ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at ?s=13 TeV Authors: The ATLAS CollaborationSultansoy, Saleh Keywords: Collisionsjetsproton–proton collisions Issue Date: Nov-2019 Publisher: Springer Source: ATLAS collaboration. (2019). ATLAS b-jet identification performance and efficiency measurement with $$t {\bar {t}}$$ events in pp collisions at $$\sqrt {s}= 13$$ s= 13 TeV. The European Physical Journal C, 79(11), 970. Abstract: 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. © 2019, CERN for the benefit of the ATLAS collaboration. URI: https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-019-7450-8https://hdl.handle.net/20.500.11851/3320 ISSN: 14346044 Appears in Collections: Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü / Department of Material Science & Nanotechnology EngineeringWoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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