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

ATLAS Collaboration; S. Alderweireldt; J.F. Allen; P. J.  Clark; J.R. Curran; D. Duda; S. M. Farrington; Y. Gao; J.M. Gargan; R.Y. González Andana; C. Jiang; C. Leonidopoulos; M. Firdaus M. Soberi; V. J.  Martin; L. Mijović; V.A. Parrish; E.A. Pender; T. Qiu; J.M. Silva; A.L. Sopio; E.M. Villhauer; H. Watson; B.M. Wynne; Z. Xu; E. Zaid

doi:10.1140/epjc/s10052-025-14682-0

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

ATLAS Collaboration
, S. Alderweireldt
, J.F. Allen
, P. J. Clark
, J.R. Curran
, D. Duda
, S. M. Farrington
, Y. Gao
, J.M. Gargan
, R.Y. González Andana
, C. Jiang
, C. Leonidopoulos
, M. Firdaus M. Soberi
, V. J. Martin
, L. Mijović
, V.A. Parrish
, E.A. Pender
, T. Qiu
, J.M. Silva
, A.L. Sopio

E.M. Villhauer, H. Watson, B.M. Wynne, Z. Xu, E. Zaid

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, contin-
uous 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 t ¯t → 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.

Original language	English
Article number	1272
Pages (from-to)	1-44
Number of pages	44
Journal	The European Physical Journal C
Volume	85
Issue number	11
DOIs	https://doi.org/10.1140/epjc/s10052-025-14682-0
Publication status	Published - 10 Nov 2025

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10.1140/epjc/s10052-025-14682-0Licence: Creative Commons: Attribution (CC-BY)

3 Finished
3 Active

Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 30/09/26
Project: Research
Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 31/03/27
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/10/22 → 30/09/26
Project: Research

Cite this

ATLAS Collaboration, Alderweireldt, S., Allen, J. F., Clark, P. J., Curran, J. R., Duda, D., Farrington, S. M., Gao, Y., Gargan, J. M., González Andana, R. Y., Jiang, C., Leonidopoulos, C., Soberi, M. F. M., Martin, V. J., Mijović, L., Parrish, V. A., Pender, E. A., Qiu, T., Silva, J. M., ... Zaid, E. (2025). A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps. The European Physical Journal C, 85(11), 1-44. Article 1272. https://doi.org/10.1140/epjc/s10052-025-14682-0

@article{c6fd9f0ca0704420b816f738d340d492,

title = "A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps",

abstract = "A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, contin- uous 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 t ¯t → 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.",

author = "\{ATLAS Collaboration\} and S. Alderweireldt and J.F. Allen and Clark, \{P. J.\} and J.R. Curran and D. Duda and Farrington, \{S. M.\} and Y. Gao and J.M. Gargan and \{Gonz{\'a}lez Andana\}, R.Y. and C. Jiang and C. Leonidopoulos and Soberi, \{M. Firdaus M.\} and Martin, \{V. J.\} and L. Mijovi{\'c} and V.A. Parrish and E.A. Pender and T. Qiu and J.M. Silva and A.L. Sopio and E.M. Villhauer and H. Watson and B.M. Wynne and Z. Xu and E. Zaid",

year = "2025",

month = nov,

day = "10",

doi = "10.1140/epjc/s10052-025-14682-0",

language = "English",

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}

ATLAS Collaboration, Alderweireldt, S, Allen, JF, Clark, PJ, Curran, JR, Duda, D , Farrington, SM , Gao, Y, Gargan, JM, González Andana, RY, Jiang, C, Leonidopoulos, C, Soberi, MFM, Martin, VJ , Mijović, L, Parrish, VA, Pender, EA, Qiu, T, Silva, JM, Sopio, AL, Villhauer, EM, Watson, H , Wynne, BM , Xu, Z & Zaid, E 2025, 'A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps', The European Physical Journal C, vol. 85, no. 11, 1272, pp. 1-44. https://doi.org/10.1140/epjc/s10052-025-14682-0

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T1 - A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps

AU - ATLAS Collaboration

AU - Alderweireldt, S.

AU - Allen, J.F.

AU - Clark, P. J.

AU - Curran, J.R.

AU - Duda, D.

AU - Farrington, S. M.

AU - Gao, Y.

AU - Gargan, J.M.

AU - González Andana, R.Y.

AU - Jiang, C.

AU - Leonidopoulos, C.

AU - Soberi, M. Firdaus M.

AU - Martin, V. J.

AU - Mijović, L.

AU - Parrish, V.A.

AU - Pender, E.A.

AU - Qiu, T.

AU - Silva, J.M.

AU - Sopio, A.L.

AU - Villhauer, E.M.

AU - Watson, H.

AU - Wynne, B.M.

AU - Xu, Z.

AU - Zaid, E.

PY - 2025/11/10

Y1 - 2025/11/10

N2 - A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, contin- uous 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 t ¯t → 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.

AB - A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, contin- uous 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 t ¯t → 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.

U2 - 10.1140/epjc/s10052-025-14682-0

DO - 10.1140/epjc/s10052-025-14682-0

M3 - Article

SN - 1434-6044

VL - 85

SP - 1

EP - 44

JO - The European Physical Journal C

JF - The European Physical Journal C

IS - 11

M1 - 1272

ER -

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

Abstract

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Projects

Experimental Particle Physics at the University of Edinburgh

Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Cite this