Journal article
ATLAS b-jet identification performance and efficiency measurement with tt¯ events in pp collisions at s√=13 TeV
- 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.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Version of record, pdf, 2.2MB, Terms of use)
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- Publisher copy:
- 10.1140/epjc/s10052-019-7450-8
Authors
Contributors
+ Huffman, B
- Institution:
- University of Oxford
- Division:
- MPLS
- Department:
- Physics
- Sub department:
- Particle Physics
- Oxford college:
- Lady Margaret Hall
- Role:
- Contributor
- Publisher:
- Springer
- Journal:
- European Physical Journal C: Particles and Fields More from this journal
- Volume:
- 79
- Issue:
- 11
- Pages:
- 970
- Publication date:
- 2019-11-25
- Acceptance date:
- 2019-10-31
- DOI:
- EISSN:
-
1434-6052
- ISSN:
-
1434-6044
- Keywords:
- Pubs id:
-
pubs:1071337
- UUID:
-
uuid:89712259-c132-491f-a00f-f23802123e4b
- Local pid:
-
pubs:1071337
- Source identifiers:
-
1071337
- Deposit date:
-
2019-11-12
Terms of use
- Copyright holder:
- CERN
- Copyright date:
- 2019
- Notes:
- © 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, 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.
- Licence:
- CC Attribution (CC BY)
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