@misc{10481/72239, year = {2021}, month = {12}, url = {http://hdl.handle.net/10481/72239}, 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 primaryvertex 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.}, organization = {ANPCyT}, organization = {YerPhI, Armenia}, organization = {Australian Research Council}, organization = {BMWFW, Austria}, organization = {Austrian Science Fund (FWF)}, organization = {Azerbaijan National Academy of Sciences (ANAS)}, organization = {SSTC, Belarus}, organization = {Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)}, organization = {Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)}, organization = {Natural Sciences and Engineering Research Council of Canada (NSERC)}, organization = {NRC, Canada}, organization = {Canada Foundation for Innovation}, organization = {CERN}, organization = {ANID, Chile}, organization = {Chinese Academy of Sciences}, organization = {Ministry of Science and Technology, China}, organization = {National Natural Science Foundation of China (NSFC)}, organization = {Minciencias, Colombia}, organization = {Ministry of Education, Youth & Sports - Czech Republic}, organization = {DNRF, Denmark}, organization = {Danish Natural Science Research Council}, organization = {Centre National de la Recherche Scientifique (CNRS)}, organization = {CEA-DRF/IRFU, France}, organization = {SRNSFG, Georgia}, organization = {Federal Ministry of Education & Research (BMBF)}, organization = {HGF, Germany}, organization = {Max Planck Society}, organization = {GSRI, Greece}, organization = {RGC, China}, organization = {Hong Kong SAR, China}, organization = {Israel Science Foundation}, organization = {Benoziyo Center, Israel}, organization = {Istituto Nazionale di Fisica Nucleare (INFN)}, organization = {Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)}, organization = {Japan Society for the Promotion of Science}, organization = {CNRST, Morocco}, organization = {Netherlands Organization for Scientific Research (NWO) Netherlands Government}, organization = {RCN, Norway}, organization = {Ministry of Science and Higher Education, Poland}, organization = {NCN, Poland}, organization = {Portuguese Foundation for Science and Technology}, organization = {European Commission}, organization = {MNE/IFA, Romania}, organization = {JINR}, organization = {Russian Federation}, organization = {NRC KI, Russian Federation}, organization = {Ministry of Education, Science & Technological Development, Serbia}, organization = {MSSR, Slovakia}, organization = {Slovenian Research Agency - Slovenia}, organization = {MIZS, Slovenia}, organization = {DSI/NRF, South Africa}, organization = {Spanish Government}, organization = {SRC, Sweden}, organization = {Wallenberg Foundation, Sweden}, organization = {SERI, Switzerland}, organization = {Swiss National Science Foundation (SNSF)}, organization = {Canton of Bern, Switzerland}, organization = {Ministry of Science and Technology, Taiwan}, organization = {Ministry of Energy & Natural Resources - Turkey}, organization = {UK Research & Innovation (UKRI)}, organization = {Science & Technology Facilities Council (STFC)}, organization = {United States Department of Energy (DOE)}, organization = {National Science Foundation (NSF)}, organization = {BCKDF, Canada}, organization = {CANARIE, Canada}, organization = {Compute Canada, Canada}, organization = {CRC, Canada}, organization = {COST, European Union}, organization = {European Research Council (ERC)}, organization = {ERDF, European Union}, organization = {Marie Sklodowska-Curie Actions, European Union Horizon 2020, European Union}, organization = {French National Research Agency (ANR)}, organization = {German Research Foundation (DFG)}, organization = {Alexander von Humboldt Foundation}, organization = {Herakleitos programme}, organization = {Thales Group}, organization = {Aristeia programme}, organization = {EU-ESF, Greece}, organization = {Greek NSRF, Greece}, organization = {BSFNSF, Israel}, organization = {German-Israeli Foundation for Scientific Research and Development}, organization = {Norwegian Financial Mechanism 2014-2021, Norway}, organization = {La Caixa Banking Foundation, Spain}, organization = {CERCA Programme Generalitat de Catalunya, Spain}, organization = {PROMETEO programme Generalitat Valenciana, Spain}, organization = {GenT programme Generalitat Valenciana, Spain}, organization = {Goran Gustafssons Stiftelse, Sweden}, organization = {Royal Society of London}, organization = {Leverhulme Trust}, organization = {Canton of Geneva, Switzerland}, publisher = {Springer}, title = {Configuration and performance of the ATLAS b-jet triggers in Run 2}, doi = {10.1140/epjc/s10052-021-09775-5}, author = {Aad, G. and Aguilar Saavedra, Juan Antonio and Atlas Collaboration}, }