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 open licence) |
| 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 UNSPECIFIED Bundesministerium für Wissenschaft, Forschung und Wirtschaft UNSPECIFIED Conselho Nacional de Desenvolvimento Científico e Tecnológico UNSPECIFIED Fundação de Amparo à Pesquisa do Estado de São Paulo UNSPECIFIED [NSERC] Natural Sciences and Engineering Research Council of Canada UNSPECIFIED Agencia Nacional de Investigación y Desarrollo UNSPECIFIED UNSPECIFIED [MSTPRC] Ministry of Science and Technology of the People's Republic of China UNSPECIFIED [NSFC] National Natural Science Foundation of China UNSPECIFIED Ministerio de Ciencia, Tecnología e Innovación UNSPECIFIED UNSPECIFIED [IN2P3] Institut national de physique nucléaire et de physique des particules UNSPECIFIED [CNRS] Centre National de la Recherche Scientifique UNSPECIFIED [CEA] Commissariat à l'Énergie Atomique et aux Énergies Alternatives UNSPECIFIED Institut de recherche sur les lois fondamentales de l'univers UNSPECIFIED UNSPECIFIED General Secretariat for Research and Innovation UNSPECIFIED UNSPECIFIED Special Administrative Regions of China UNSPECIFIED UNSPECIFIED [MEXT] Ministry of Education, Culture, Sports, Science and Technology UNSPECIFIED Centre National pour la Recherche Scientifique et Technique UNSPECIFIED [NWO] Nederlandse Organisatie voor Wetenschappelijk Onderzoek UNSPECIFIED Serbia. Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja UNSPECIFIED Ministerstvo Spravodlivosti Slovenskej Republiky UNSPECIFIED UNSPECIFIED Slovenian Research And Innovation Agency UNSPECIFIED UNSPECIFIED Ministrstvo za vzgojo in izobraževanje UNSPECIFIED UNSPECIFIED Ministerio de Ciencia, Innovación y Universidades UNSPECIFIED UNSPECIFIED [SERI] Staatssekretariat für Bildung, Forschung und Innovation UNSPECIFIED [SNSF] Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung UNSPECIFIED Cantons of Bern and Geneva, Switzerland UNSPECIFIED UNSPECIFIED Investissements d'Avenir Labex and Idex UNSPECIFIED UNSPECIFIED National Strategic Reference Framework UNSPECIFIED UNSPECIFIED United States-Israel Binational Science Foundation UNSPECIFIED Narodowa Agencja Wymiany Akademickiej UNSPECIFIED UNSPECIFIED Göran Gustafssons Stiftelse UNSPECIFIED |
| URI: | https://wrap.warwick.ac.uk/180898/ |
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