ATLAS Collaboration (Including: Becker, K., Ghani, M., Guilloton, E., Harrison, P. F., Kerridge, B. P., Martin, T. A., Mitra, A. , Murray, W. A., Pollard, C. S. , Potamianos, K., Roberts, B. A. and Vladimirov, V. E.). (2023) Fast b-tagging at the high-level trigger of the ATLAS experiment in LHC Run 3. Journal of Instrumentation, 18 (11). P11006. doi:10.1088/1748-0221/18/11/p11006 ISSN 1748-0221.

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Abstract

The ATLAS experiment relies on real-time hadronic jet reconstruction and b-tagging to record fully hadronic events containing b-jets. These algorithms require track reconstruction, which is computationally expensive and could overwhelm the high-level-trigger farm, even at the reduced event rate that passes the ATLAS first stage hardware-based trigger. In LHC Run 3, ATLAS has mitigated these computational demands by introducing a fast neural-network-based b-tagger, which acts as a low-precision filter using input from hadronic jets and tracks. It runs after a hardware trigger and before the remaining high-level-trigger reconstruction. This design relies on the negligible cost of neural-network inference as compared to track reconstruction, and the cost reduction from limiting tracking to specific regions of the detector. In the case of Standard Model HH → bb̅bb̅, a key signature relying on b-jet triggers, the filter lowers the input rate to the remaining high-level trigger by a factor of five at the small cost of reducing the overall signal efficiency by roughly 2%.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
SWORD Depositor:	Library Publications Router
Library of Congress Subject Headings (LCSH):	Higgs bosons, Quarks -- Decay, Particles (Nuclear physics), Large Hadron Collider (France and Switzerland), Algorithms
Journal or Publication Title:	Journal of Instrumentation
Publisher:	IOP Publishing
ISSN:	1748-0221
Official Date:	10 November 2023
Dates:	Date Event 10 November 2023 Published 21 June 2023 Accepted
Volume:	18
Number:	11
Article Number:	P11006
DOI:	10.1088/1748-0221/18/11/p11006
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access (Creative Commons)
Date of first compliant deposit:	9 January 2024
Date of first compliant Open Access:	10 January 2024
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID UNSPECIFIED Agencia Nacional de Promoción Científica y Tecnológica http://dx.doi.org/10.13039/501100003074 UNSPECIFIED Erewani Fizikayi Institowt http://viaf.org/viaf/138989470 UNSPECIFIED [ARC] Australian Research Council http://dx.doi.org/10.13039/501100000923 UNSPECIFIED Bundesministerium für Wissenschaft, Forschung und Wirtschaft http://dx.doi.org/10.13039/501100003413 UNSPECIFIED Austrian Science Fund http://dx.doi.org/10.13039/501100002428 UNSPECIFIED Azärbaycan Milli Elmlär Akademiyası http://viaf.org/viaf/168770251 UNSPECIFIED Conselho Nacional de Desenvolvimento Científico e Tecnológico http://dx.doi.org/10.13039/501100003593 UNSPECIFIED Fundação de Amparo à Pesquisa do Estado de São Paulo http://dx.doi.org/10.13039/501100001807 UNSPECIFIED [NSERC] Natural Sciences and Engineering Research Council of Canada http://dx.doi.org/10.13039/501100000038 UNSPECIFIED [NRC] National Research Council Canada http://dx.doi.org/10.13039/501100000046 UNSPECIFIED [CFI] Canada Foundation for Innovation http://dx.doi.org/10.13039/501100000196 UNSPECIFIED CERN http://dx.doi.org/10.13039/100012470 UNSPECIFIED Agencia Nacional de Investigación y Desarrollo UNSPECIFIED UNSPECIFIED [CAS] Chinese Academy of Sciences http://dx.doi.org/10.13039/501100002367 UNSPECIFIED [MSTPRC] Ministry of Science and Technology of the People's Republic of China http://dx.doi.org/10.13039/501100002855 UNSPECIFIED [NSFC] National Natural Science Foundation of China http://dx.doi.org/10.13039/501100001809 UNSPECIFIED Ministerio de Ciencia, Tecnología e Innovación UNSPECIFIED UNSPECIFIED Ministerstvo Školství, Mládeže a Tělovýchovy http://dx.doi.org/10.13039/501100001823 UNSPECIFIED Danmarks Grundforskningsfond http://dx.doi.org/10.13039/501100001732 UNSPECIFIED Natur og Univers, Det Frie Forskningsråd http://dx.doi.org/10.13039/100008394 UNSPECIFIED [IN2P3] Institut national de physique nucléaire et de physique des particules http://viaf.org/viaf/137207166 UNSPECIFIED [CNRS] Centre National de la Recherche Scientifique http://dx.doi.org/10.13039/501100004794 UNSPECIFIED [CEA] Commissariat à l'Énergie Atomique et aux Énergies Alternatives http://dx.doi.org/10.13039/501100006489 UNSPECIFIED Institut de recherche sur les lois fondamentales de l'univers UNSPECIFIED UNSPECIFIED Shota Rustaveli National Science Foundation http://dx.doi.org/10.13039/501100004801 UNSPECIFIED Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347 UNSPECIFIED Helmholtz-Gemeinschaft http://dx.doi.org/10.13039/501100001656 UNSPECIFIED Max-Planck-Gesellschaft http://dx.doi.org/10.13039/501100004189 UNSPECIFIED General Secretariat for Research and Innovation UNSPECIFIED UNSPECIFIED Research Grants Council (Hong Kong, China) http://viaf.org/viaf/143907376 UNSPECIFIED Special Administrative Regions of China UNSPECIFIED UNSPECIFIED Israel Science Foundation http://dx.doi.org/10.13039/501100003977 UNSPECIFIED Weizmann Institute of Science http://dx.doi.org/10.13039/501100001735 UNSPECIFIED [INFN] Instituto Nazionale di Fisica Nucleare http://dx.doi.org/10.13039/501100004007 UNSPECIFIED [MEXT] Ministry of Education, Culture, Sports, Science and Technology http://dx.doi.org/10.13039/501100001700 UNSPECIFIED [JSPS] Japan Society for the Promotion of Science http://dx.doi.org/10.13039/501100001691 UNSPECIFIED Centre National pour la Recherche Scientifique et Technique http://dx.doi.org/10.13039/501100006319 UNSPECIFIED [NWO] Nederlandse Organisatie voor Wetenschappelijk Onderzoek http://dx.doi.org/10.13039/501100003246 UNSPECIFIED Norges Forskningsråd http://dx.doi.org/10.13039/501100005416 UNSPECIFIED Ministerstwo Nauki i Szkolnictwa Wyższego http://dx.doi.org/10.13039/501100004569 UNSPECIFIED Fundação para a Ciência e a Tecnologia http://dx.doi.org/10.13039/501100001871 UNSPECIFIED Institutul de Fizică Atomică http://viaf.org/viaf/154740159 UNSPECIFIED Serbia. Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja http://viaf.org/viaf/8671152381810201950000 UNSPECIFIED Ministerstvo Spravodlivosti Slovenskej Republiky UNSPECIFIED UNSPECIFIED Slovenian Research And Innovation Agency UNSPECIFIED UNSPECIFIED Ministrstvo za vzgojo in izobraževanje UNSPECIFIED UNSPECIFIED National Research Foundation http://dx.doi.org/10.13039/501100001321 UNSPECIFIED Ministerio de Ciencia, Innovación y Universidades UNSPECIFIED UNSPECIFIED Vetenskapsrådet http://dx.doi.org/10.13039/501100004359 UNSPECIFIED Knut och Alice Wallenbergs Stiftelse http://dx.doi.org/10.13039/501100004063 UNSPECIFIED [SERI] Staatssekretariat für Bildung, Forschung und Innovation http://dx.doi.org/10.13039/501100007352 UNSPECIFIED [SNSF] Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung http://dx.doi.org/10.13039/501100001711 UNSPECIFIED Cantons of Bern and Geneva, Switzerland UNSPECIFIED UNSPECIFIED Ministry of Science and Technology, Taiwan http://dx.doi.org/10.13039/501100004663 UNSPECIFIED Türkiye Atom Enerjisi Kurumu http://dx.doi.org/10.13039/100010440 UNSPECIFIED [STFC] Science and Technology Facilities Council http://dx.doi.org/10.13039/501100000271 UNSPECIFIED [DOE] U.S. Department of Energy http://dx.doi.org/10.13039/100000015 UNSPECIFIED [NSF] National Science Foundation (US) http://dx.doi.org/10.13039/100000001 UNSPECIFIED British Columbia Knowledge Development Fund http://dx.doi.org/10.13039/501100007711 UNSPECIFIED Canarie http://dx.doi.org/10.13039/100008313 UNSPECIFIED Compute Canada http://dx.doi.org/10.13039/100013020 UNSPECIFIED Canada Research Chairs http://dx.doi.org/10.13039/501100001804 UNSPECIFIED European Cooperation in Science and Technology http://dx.doi.org/10.13039/501100000921 UNSPECIFIED European Research Council http://dx.doi.org/10.13039/501100000781 UNSPECIFIED [ERDF] European Regional Development Fund http://dx.doi.org/10.13039/501100008530 UNSPECIFIED H2020 Marie Skłodowska-Curie Actions http://dx.doi.org/10.13039/100010665 UNSPECIFIED European Commission http://dx.doi.org/10.13039/501100000780 UNSPECIFIED Investissements d'Avenir Labex and Idex UNSPECIFIED UNSPECIFIED [ANR] Agence Nationale de la Recherche http://dx.doi.org/10.13039/501100001665 UNSPECIFIED [DFG] Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659 UNSPECIFIED Alexander von Humboldt-Stiftung http://dx.doi.org/10.13039/100005156 UNSPECIFIED European Social Fund http://dx.doi.org/10.13039/501100004895 UNSPECIFIED National Strategic Reference Framework UNSPECIFIED UNSPECIFIED United States-Israel Binational Science Foundation http://dx.doi.org/10.13039/501100001742 UNSPECIFIED Minerva Foundation http://dx.doi.org/10.13039/501100001658 UNSPECIFIED Narodowe Centrum Nauki http://dx.doi.org/10.13039/501100004281 UNSPECIFIED Narodowa Agencja Wymiany Akademickiej UNSPECIFIED UNSPECIFIED Generalitat de Catalunya http://dx.doi.org/10.13039/501100002809 UNSPECIFIED Generalitat Valenciana http://dx.doi.org/10.13039/501100003359 UNSPECIFIED Göran Gustafssons Stiftelse UNSPECIFIED UNSPECIFIED [RS] Royal Society http://dx.doi.org/10.13039/501100000288 UNSPECIFIED Leverhulme Trust http://dx.doi.org/10.13039/501100000275

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