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A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps

Aad, G. ; Åkesson, T.P.A. LU orcid ; Astrand, K.S.V. LU ; Doglioni, C. LU ; Ekman, P.A. LU orcid ; Hedberg, V. LU ; Herde, H. LU orcid ; Konya, B. LU ; Lytken, E. LU orcid and Poettgen, R. LU orcid , et al. (2025) In European Physical Journal C 85(11).
Abstract
A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, continuous corrections to the b-jet, c-jet, and light-flavour jet classification probabilities from jet-tagging algorithms in simulation are derived for b-jets using tt¯→eμννbb data. After application of the derived calibration maps, closure between simulation and observation is achieved for jet flavour observables used in ATLAS analyses of Large Hadron Collider (LHC) Run 2 proton-proton collision data. This continuous calibration opens up new possibilities for the future use of jet flavour information in LHC analyses and also serves as a guide for deriving high-dimensional corrections to... (More)
A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, continuous corrections to the b-jet, c-jet, and light-flavour jet classification probabilities from jet-tagging algorithms in simulation are derived for b-jets using tt¯→eμννbb data. After application of the derived calibration maps, closure between simulation and observation is achieved for jet flavour observables used in ATLAS analyses of Large Hadron Collider (LHC) Run 2 proton-proton collision data. This continuous calibration opens up new possibilities for the future use of jet flavour information in LHC analyses and also serves as a guide for deriving high-dimensional corrections to simulation via transportation maps, an important development for a broad range of inference tasks. © CERN for the benefit of the ATLAS Collaboration 2025. (Less)
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type
Contribution to journal
publication status
published
subject
keywords
Classification (of information), Colliding beam accelerators, Fighter aircraft, High energy physics, Maps, Microstrip devices, Calibration procedure, Continuous calibrations, High-dimensional, Higher-dimensional, Large Hadron Collider, Large-hadron colliders, Optimal transportations, Proton proton collisions, Calibration
in
European Physical Journal C
volume
85
issue
11
article number
1272
publisher
Springer Nature
external identifiers
  • scopus:105023226792
ISSN
1434-6044
DOI
10.1140/epjc/s10052-025-14682-0
language
English
LU publication?
yes
id
4b2cb95c-3479-4dcd-a7e8-e9eeb1073f2d
date added to LUP
2026-04-09 08:06:25
date last changed
2026-08-29 02:58:38
@article{4b2cb95c-3479-4dcd-a7e8-e9eeb1073f2d,
  abstract     = {{A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, continuous corrections to the b-jet, c-jet, and light-flavour jet classification probabilities from jet-tagging algorithms in simulation are derived for b-jets using tt¯→eμννbb data. After application of the derived calibration maps, closure between simulation and observation is achieved for jet flavour observables used in ATLAS analyses of Large Hadron Collider (LHC) Run 2 proton-proton collision data. This continuous calibration opens up new possibilities for the future use of jet flavour information in LHC analyses and also serves as a guide for deriving high-dimensional corrections to simulation via transportation maps, an important development for a broad range of inference tasks. © CERN for the benefit of the ATLAS Collaboration 2025.}},
  author       = {{Aad, G. and Åkesson, T.P.A. and Astrand, K.S.V. and Doglioni, C. and Ekman, P.A. and Hedberg, V. and Herde, H. and Konya, B. and Lytken, E. and Poettgen, R. and Smirnova, O. and Wallin, E.J. and Zwalinski, L.}},
  issn         = {{1434-6044}},
  keywords     = {{Classification (of information); Colliding beam accelerators; Fighter aircraft; High energy physics; Maps; Microstrip devices; Calibration procedure; Continuous calibrations; High-dimensional; Higher-dimensional; Large Hadron Collider; Large-hadron colliders; Optimal transportations; Proton proton collisions; Calibration}},
  language     = {{eng}},
  number       = {{11}},
  publisher    = {{Springer Nature}},
  series       = {{European Physical Journal C}},
  title        = {{A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-025-14682-0}},
  doi          = {{10.1140/epjc/s10052-025-14682-0}},
  volume       = {{85}},
  year         = {{2025}},
}