Constraining off-shell Higgs boson production and the Higgs boson total width using WW textrightarrow ellnuellnu final states with the ATLAS detector

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; E.A. Pender; T. Qiu; J.M. Silva; A.L. Sopio; F. Ustuner; H. Watson; B.M. Wynne; Z. Xu

doi:10.1016/j.physletb.2025.139898

Constraining off-shell Higgs boson production and the Higgs boson total width using WW textrightarrow ellnuellnu final states with the ATLAS detector

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, E.A. Pender, T. Qiu, J.M. Silva, A.L. Sopio, F. UstunerH. Watson, B.M. Wynne, Z. Xu

School of Physics and Astronomy

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

Abstract

A measurement of off-shell Higgs boson production is performed in the 𝐻∗ → 𝑊 𝑊 channel. The measurement uses a proton–proton collision dataset with an integrated luminosity of 140 fb−1 collected at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. Final states in which both 𝑊 bosons
decay leptonically are targeted, and events are categorised based on the flavour of the final-state leptons, the jet multiplicity, and the output of neural network-based classifiers. The data are found to be compatible with the Standard Model expectation. An observed (expected) upper bound on the 95 % symmetric confidence level
interval is set on the rate of off-shell Higgs boson production at a value of 3.4 (4.4) times the Standard Model prediction. These results are combined with the results from the measurement of on-shell Higgs boson production in the same final states to obtain an observed (expected) upper bound at 95 % confidence level on the Higgs boson total width of 13.1 (17.3) MeV.

Original language	English
Article number	139898
Pages (from-to)	1-21
Number of pages	21
Journal	Physics Letters B
Volume	870
DOIs	https://doi.org/10.1016/j.physletb.2025.139898
Publication status	Published - 1 Nov 2025

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3 Finished
3 Active

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
1/04/23 → 30/09/26
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., Pender, E. A., Qiu, T., Silva, J. M., Sopio, A. L., ... Xu, Z. (2025). Constraining off-shell Higgs boson production and the Higgs boson total width using WW textrightarrow ellnuellnu final states with the ATLAS detector. Physics Letters B, 870, 1-21. Article 139898. https://doi.org/10.1016/j.physletb.2025.139898

@article{7d9643a0f79b48e786cb0656f205547d,

title = "Constraining off-shell Higgs boson production and the Higgs boson total width using WW textrightarrow ellnuellnu final states with the ATLAS detector",

abstract = "A measurement of off-shell Higgs boson production is performed in the 𝐻∗ → 𝑊 𝑊 channel. The measurement uses a proton–proton collision dataset with an integrated luminosity of 140 fb−1 collected at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. Final states in which both 𝑊 bosons decay leptonically are targeted, and events are categorised based on the flavour of the final-state leptons, the jet multiplicity, and the output of neural network-based classifiers. The data are found to be compatible with the Standard Model expectation. An observed (expected) upper bound on the 95 \% symmetric confidence level interval is set on the rate of off-shell Higgs boson production at a value of 3.4 (4.4) times the Standard Model prediction. These results are combined with the results from the measurement of on-shell Higgs boson production in the same final states to obtain an observed (expected) upper bound at 95 \% confidence level on the Higgs boson total width of 13.1 (17.3) MeV.",

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 E.A. Pender and T. Qiu and J.M. Silva and A.L. Sopio and F. Ustuner and H. Watson and B.M. Wynne and Z. Xu",

year = "2025",

month = nov,

day = "1",

doi = "10.1016/j.physletb.2025.139898",

language = "English",

volume = "870",

pages = "1--21",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

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, Pender, EA, Qiu, T , Silva, JM , Sopio, AL, Ustuner, F, Watson, H , Wynne, BM & Xu, Z 2025, 'Constraining off-shell Higgs boson production and the Higgs boson total width using WW textrightarrow ellnuellnu final states with the ATLAS detector', Physics Letters B, vol. 870, 139898, pp. 1-21. https://doi.org/10.1016/j.physletb.2025.139898

TY - JOUR

T1 - Constraining off-shell Higgs boson production and the Higgs boson total width using WW textrightarrow ellnuellnu final states with the ATLAS detector

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 - Pender, E.A.

AU - Qiu, T.

AU - Silva, J.M.

AU - Sopio, A.L.

AU - Ustuner, F.

AU - Watson, H.

AU - Wynne, B.M.

AU - Xu, Z.

PY - 2025/11/1

Y1 - 2025/11/1

N2 - A measurement of off-shell Higgs boson production is performed in the 𝐻∗ → 𝑊 𝑊 channel. The measurement uses a proton–proton collision dataset with an integrated luminosity of 140 fb−1 collected at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. Final states in which both 𝑊 bosons decay leptonically are targeted, and events are categorised based on the flavour of the final-state leptons, the jet multiplicity, and the output of neural network-based classifiers. The data are found to be compatible with the Standard Model expectation. An observed (expected) upper bound on the 95 % symmetric confidence level interval is set on the rate of off-shell Higgs boson production at a value of 3.4 (4.4) times the Standard Model prediction. These results are combined with the results from the measurement of on-shell Higgs boson production in the same final states to obtain an observed (expected) upper bound at 95 % confidence level on the Higgs boson total width of 13.1 (17.3) MeV.

AB - A measurement of off-shell Higgs boson production is performed in the 𝐻∗ → 𝑊 𝑊 channel. The measurement uses a proton–proton collision dataset with an integrated luminosity of 140 fb−1 collected at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. Final states in which both 𝑊 bosons decay leptonically are targeted, and events are categorised based on the flavour of the final-state leptons, the jet multiplicity, and the output of neural network-based classifiers. The data are found to be compatible with the Standard Model expectation. An observed (expected) upper bound on the 95 % symmetric confidence level interval is set on the rate of off-shell Higgs boson production at a value of 3.4 (4.4) times the Standard Model prediction. These results are combined with the results from the measurement of on-shell Higgs boson production in the same final states to obtain an observed (expected) upper bound at 95 % confidence level on the Higgs boson total width of 13.1 (17.3) MeV.

U2 - 10.1016/j.physletb.2025.139898

DO - 10.1016/j.physletb.2025.139898

M3 - Letter

SN - 0370-2693

VL - 870

SP - 1

EP - 21

JO - Physics Letters B

JF - Physics Letters B

M1 - 139898

ER -

Constraining off-shell Higgs boson production and the Higgs boson total width using WW textrightarrow ellnuellnu final states with the ATLAS detector

Abstract

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Projects

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

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

Cite this

Constraining off-shell Higgs boson production and the Higgs boson total width using WW textrightarrow ellnuellnu final states with the ATLAS detector