Configuration and performance of the ATLAS b-jet triggers in Run 2
EntityUAM. Departamento de Física Teórica
10.1140/epjc/s10052-021-09775-5European Physical Journal C 81.12 (2021): 1087
ISSN1434-6044 (print); 1434-6052 (online)
SubjectsBoson; Partons; Higgs Bosons; Física
NoteArtículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM
Rights© CERN for the benefit of the ATLAS collaboration 2021
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
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
Google Scholar:Aad, G. - ATLAS Collaboration - Álvarez Estévez, Manuel - Barreiro Alonso, Fernando - Calvente López, Sergio - Camarero Muñoz, Daniel - Peso Malagón, José del - Glasman Kuguel, Claudia Beatriz - Terrón Cuadrado, Juan
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