Configuration and performance of the ATLAS b-jet triggers in Run 2
2021-12-09 | journal article. A publication with affiliation to the University of Göttingen.
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Configuration and performance of the ATLAS b-jet triggers in Run 2
Aad, G.; Abbott, B.; Abbott, D. C.; Abed Abud, A.; Abeling, K.; Abhayasinghe, D. K. & Abidi, S. H. et al. (2021)
The European Physical Journal C, 81(12) art. 1087. DOI: https://doi.org/10.1140/epjc/s10052-021-09775-5
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Details
- Authors Group
- ATLAS Collaboration
The authors list is uncomplete: - Authors
- Aad, G.; Abbott, B.; Abbott, D. C.; Abed Abud, A.; Abeling, K.; Abhayasinghe, D. K.; Abidi, S. H.; AbouZeid, O. S.; Abraham, N. L.; Abramowicz, H.; Albert, J.; Ali, S.; Anthony, M. T.; Arnold, H.; Balaji, S.; Bauer, F.; Chen, J.; Chen, J.; Chen, J.; Chen, S.; Chen, Y.; David, C.; De Castro, S.; Dreyer, T.; Falke, S.; Fournier, D.; Gao, Y.; Gao, Y. S.; George, S.; Grosse-Knetter, J.; Guenther, J.; Han, S.; Harenberg, T.; Heim, S.; Heim, T.; Herrmann, T.; Holm, T.; Hu, S.; Jin, S.; Keller, J. S.; Kersten, S.; Kim, E.; Kluth, S.; Krüger, H.; Kuhl, T.; Lai, S.; Lee, S.; Lehmann, K.; Lehmann, N.; Lenz, T.; Li, H.; Li, H.; Li, J.; Li, K.; Li, X.; Li, Y.; Liu, B.; Lorenz, J.; Lu, M.; Lu, S.; Lutz, M. S.; Martinez, M.; Menke, S.; Meyer, C.; Morgenstern, S.; Mueller, J.; Quadt, A.; Rajagopalan, S.; Rave, S.; Schaefer, L.; Schoening, A.; Schott, M.; Schulte, A.; Seitz, C.; Sen, S.; Wang, C.; Wang, C.; Wang, H.; Wang, J.; Wang, Y.; Weber, M. S.; Xu, T.; Xu, Y.; Zhang, B.; Zhang, J.; Zhang, K.; Zhang, M.; Zhang, Y.; Zhao, Z.; Zhou, Y.; Zhu, C.
- Abstract
- Abstract Several improvements to the ATLAS triggers used to identify jets containing b-hadrons (b-jets) were implemented for data-taking during Run 2 of the Large Hadron Collider from 2016 to 2018. These changes include reconfiguring the b-jet trigger software to improve primary-vertex finding and allow more stable running in conditions with high pile-up, and the implementation of the functionality needed to run sophisticated taggers used by the offline reconstruction in an online environment. These improvements yielded an order of magnitude better light-flavour jet rejection for the same b-jet identification efficiency compared to the performance in Run 1 (2011–2012). The efficiency to identify b-jets in the trigger, and the conditional efficiency for b-jets that satisfy offline b-tagging requirements to pass the trigger are also measured. Correction factors are derived to calibrate the b-tagging efficiency in simulation to match that observed in data. The associated systematic uncertainties are substantially smaller than in previous measurements. In addition, b-jet triggers were operated for the first time during heavy-ion data-taking, using dedicated triggers that were developed to identify semileptonic b-hadron decays by selecting events with geometrically overlapping muons and jets.
- Issue Date
- 9-December-2021
- Publisher
- Springer Berlin Heidelberg
- Journal
- The European Physical Journal C
- ISSN
- 1434-6044
- eISSN
- 1434-6052
- Language
- English
