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Article
Report number arXiv:2405.03253 ; CERN-EP-2024-108
Title Calibration of a soft secondary vertex tagger using proton-proton collisions at s=13 TeV with the ATLAS detector
Author(s) ATLAS Collaboration  Show all 2961 authors
Corporate Author(s) ATLAS Collaboration
Publication 2024-08-01
Imprint 07 May 2024
Number of pages 30
Note 42 pages in total, author list starting page 25, 4 figures, 7 tables, published in PRD. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/FTAG-2023-02/
In: Phys. Rev. D 110 (2024) 032015
DOI 10.1103/PhysRevD.110.032015 (publication)
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords detector ; particle identification ; experimental results ; low momentum ; b-tagging
Abstract Several processes studied by the ATLAS experiment at the Large Hadron Collider produce low-momentum b-flavored hadrons in the final state. This paper describes the calibration of a dedicated tagging algorithm that identifies b-flavored hadrons outside of hadronic jets by reconstructing the soft secondary vertices originating from their decays. The calibration is based on a proton-proton collision dataset at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 140 fb1. Scale factors used to correct the algorithm's performance in simulated events are extracted for the b-tagging efficiency and the mistag rate of the algorithm using a data sample enriched in tˉt events. Several orthogonal measurement regions are defined, binned as a function of the multiplicities of soft secondary vertices and jets containing a b-flavored hadron in the event. The mistag rate scale factors are estimated separately for events with low and high average number of interactions per bunch crossing. The results, which are derived from events with low missing transverse momentum, are successfully validated in a phase space characterized by high missing transverse momentum and therefore are applicable to new physics searches carried out in either phase space regimes.
Related document supersedes: ATLAS-CONF-2019-027
Copyright/License Preprint: © 2024-2025 CERN (License: CC-BY-4.0)
Publication: © 2024-2025 CERN (License: CC BY 4.0), sponsored by SCOAP³



Corresponding record in: Inspire
Email contact: tatjana.lenz@cern.ch


 Záznam vytvorený 2024-05-07, zmenený 2025-01-18


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