Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/123957
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Type: | Journal article |
Title: | ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at √s = 13 TeV |
Other Titles: | ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at root s = 13 TeV |
Author: | Aad, G. Abbott, B. Abbott, D.C. Abud, A.A. Abeling, K. Abhayasinghe, D.K. Abidi, S.H. AbouZeid, O.S. Abraham, N.L. Abramowicz, H. Abreu, H. Abulaiti, Y. Acharya, B.S. Achkar, B. Adachi, S. Adam, L. Bourdarios, C.A. Adamczyk, L. Adamek, L. Adelman, J. et al. |
Citation: | European Physical Journal C: Particles and Fields, 2019; 79(11):970-1-970-36 |
Publisher: | Springer Nature |
Issue Date: | 2019 |
ISSN: | 1434-6044 1434-6052 |
Statement of Responsibility: | G. Aad …. D. Duvnjak … P. Jackson … A. Petridis … A. Qureshi …. A.S. Sharma … M.J. White … et al. [The ATLAS Collaboration] |
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. |
Rights: | © CERN for the benefit of the ATLAS collaboration 2019. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP³. |
DOI: | 10.1140/epjc/s10052-019-7450-8 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1140/epjc/s10052-019-7450-8 |
Appears in Collections: | Aurora harvest 4 Physics publications |
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hdl_123957.pdf | Published version | 1.68 MB | Adobe PDF | View/Open |
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