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Article: Configuration and performance of the ATLAS b-jet triggers in Run 2

TitleConfiguration and performance of the ATLAS b-jet triggers in Run 2
Authors
Issue Date2021
PublisherSpringer Verlag: SCOAP3. The Journal's web site is located at http://epjc.edpsciences.org
Citation
The European Physical Journal C: Particles and Fields, 2021, v. 81 n. 12, article no. 1087 How to Cite?
AbstractSeveral 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.
Persistent Identifierhttp://hdl.handle.net/10722/309339
ISSN
2023 Impact Factor: 4.2
2023 SCImago Journal Rankings: 1.451
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorATLAS Collaboration-
dc.contributor.authorParedes Hernandez, D-
dc.contributor.authorPeng, C-
dc.contributor.authorTam, KC-
dc.contributor.authorTu, Y-
dc.contributor.authorPizzimento, L-
dc.date.accessioned2021-12-29T02:13:41Z-
dc.date.available2021-12-29T02:13:41Z-
dc.date.issued2021-
dc.identifier.citationThe European Physical Journal C: Particles and Fields, 2021, v. 81 n. 12, article no. 1087-
dc.identifier.issn1434-6044-
dc.identifier.urihttp://hdl.handle.net/10722/309339-
dc.description.abstractSeveral 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.-
dc.languageeng-
dc.publisherSpringer Verlag: SCOAP3. The Journal's web site is located at http://epjc.edpsciences.org-
dc.relation.ispartofThe European Physical Journal C: Particles and Fields-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleConfiguration and performance of the ATLAS b-jet triggers in Run 2-
dc.typeArticle-
dc.identifier.emailParedes Hernandez, D: dparedes@hku.hk-
dc.identifier.emailPeng, C: samp0808@HKUCC-COM.hku.hk-
dc.identifier.emailTu, Y: yanjuntu@hku.hk-
dc.identifier.authorityTu, Y=rp01971-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1140/epjc/s10052-021-09775-5-
dc.identifier.scopuseid_2-s2.0-85120958752-
dc.identifier.hkuros331327-
dc.identifier.volume81-
dc.identifier.issue12-
dc.identifier.spagearticle no. 1087-
dc.identifier.epagearticle no. 1087-
dc.identifier.isiWOS:000728553000002-
dc.publisher.placeGermany-

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