Study of Higgs boson pair production in the HH→bb‾γγ final state with 308 fb−1 of data collected at s= 13 TeV and 13.6 TeV by the ATLAS experiment

doi:10.1016/j.physletb.2026.140280

Study of Higgs boson pair production in the HH→bb‾γγ final state with 308 fb−1 of data collected at s= 13 TeV and 13.6 TeV by the ATLAS experiment

University of Glasgow
Deutsches Elektronen-Synchrotron (DESY)
European Organization for Nuclear Research
Shanghai Jiao Tong University
Simon Fraser University
University of Hong Kong
Michigan State University
University of Edinburgh
University of Michigan, Ann Arbor
Columbia University
TU Dortmund University
Université Clermont Auvergne
Universität Würzburg
University of Bergen
Osaka University
Chinese Academy Of Sciences
University of Chinese Academy of Sciences
Max-Planck-Institut für Physik
Department of Physics, Lancaster University
University of Pittsburgh
University of the Witwatersrand, Johannesburg
Shandong University
University of Manchester
Tsinghua University
Université de Paris
McGill University
University of Tokyo
New York University
University of Washington
Sun Yat-Sen University
University of Illinois
Université Paris 11
Academia Sinica, Institute Of Physics
Campus UAB
Univ. Paris-Diderot
Department of Physics
The University of British Columbia
Ohio State University
Brandeis University
University of Geneva
University Montreal
Lawrence Berkeley National Laboratory
The Hong Kong University of Science and Technology
Harvard University
Argonne National Laboratory
Nanjing University
Shefield University
Universite Paul Sabatier
University College London
Carleton University
SLAC National Accelerator Laboratory

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

Abstract

A search for Higgs boson pair production in the bb¯γγ final state is performed. The proton–proton collision dataset corresponds to an integrated luminosity of 308 fb⁻¹, consisting of two samples, 140 fb⁻¹ at a centre-of-mass energy of s=13TeV and 168 fb⁻¹ at s=13.6TeV, recorded between 2015 and 2024 by the ATLAS detector at the CERN Large Hadron Collider. In addition to a larger dataset, this analysis improves upon the previous search in the same final state through several methodological and technical developments. The Higgs boson pair production cross section divided by the Standard Model prediction is found to be μ_HH=0.9_−1.1^+1.4 (μ_HH=1_−1.0^+1.3 expected), which translates into a 95% confidence-level upper limit of μ_HH ' 3.7. At the same confidence level the Higgs self-coupling modifier is constrained to be in the range −1.6'κ_λ'6.6 (−1.8'κ_λ'6.9 expected).

Original language	British English
Article number	140280
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	876
DOIs	https://doi.org/10.1016/j.physletb.2026.140280
State	Published - May 2026

Keywords

ATLAS
B-jets
Di-Higgs
Photons
Run 3
Self-interaction

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10.1016/j.physletb.2026.140280

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@article{c3d5efab0a8f4befb006de7cdbe79527,

title = "Study of Higgs boson pair production in the HH→bb‾γγ final state with 308 fb−1 of data collected at s= 13 TeV and 13.6 TeV by the ATLAS experiment",

abstract = "A search for Higgs boson pair production in the bb¯γγ final state is performed. The proton–proton collision dataset corresponds to an integrated luminosity of 308 fb−1, consisting of two samples, 140 fb−1 at a centre-of-mass energy of s=13TeV and 168 fb−1 at s=13.6TeV, recorded between 2015 and 2024 by the ATLAS detector at the CERN Large Hadron Collider. In addition to a larger dataset, this analysis improves upon the previous search in the same final state through several methodological and technical developments. The Higgs boson pair production cross section divided by the Standard Model prediction is found to be μHH=0.9−1.1+1.4 (μHH=1−1.0+1.3 expected), which translates into a 95\% confidence-level upper limit of μHH ' 3.7. At the same confidence level the Higgs self-coupling modifier is constrained to be in the range −1.6'κλ'6.6 (−1.8'κλ'6.9 expected).",

keywords = "ATLAS, B-jets, Di-Higgs, Photons, Run 3, Self-interaction",

author = "S. Ali and Anderson, \{A. C.\} and M. Barakat and H. Cai and J. Chen and J. Chen and Z. Chen and Das, \{S. J.\} and Didenko, \{A. R.\} and Fan, \{K. Y.\} and D. Francis and Y. Fu and Y. Gao and Y. Guo and Y. Guo and A. Gupta and A. Haddad and M. Haleem and S. Hassan and M. Hirose and X. Huang and X. Jia and Jones, \{R. W.L.\} and Khan, \{R. A.\} and M. Kumar and P. Kumari and B. Li and H. Li and H. Li and H. Li and H. Li and H. Li and K. Li and L. Li and R. Li and S. Li and S. Li and T. Li and X. Li and Y. Li and Z. Li and Z. Li and Z. Li and Liu, \{J. K.K.\} and P. Liu and Q. Liu and Y. Liu and Y. Liu and Y. Liu and Y. Liu and Z. Liu and Lu, \{Y. J.\} and Martin, \{T. A.\} and M. Martinez and J. Pan and L. Panwar and S. Parajuli and Shah, \{A. H.\} and A. Sharma and A. Sharma and P. Sharma and S. Shrestha and S. Singh and S. Singh and R. Soualah and Y. Tian and M. Usman and H. Wang and J. Wang and R. Wang and R. Wang and X. Wang and X. Wang and X. Wang and Y. Wang and Y. Wang and Z. Wang and Z. Wang and Z. Wang and J. Wu and Y. Xu and S. Yan and Yang, \{H. J.\} and Yang, \{H. J.\} and X. Yang and X. Yang and Y. Yang and Y. Yang and Zhang, \{D. F.\} and S. Zhang and T. Zhang and Y. Zhang and Y. Zhang and Y. Zhang and Y. Zhang and Z. Zhang and Z. Zhang and Z. Zhang and H. Zhao and Y. Zhao and Z. Zheng and B. Zhou and H. Zhou and Y. Zhou and Y. Zhou and Y. Zhou and J. Zhu",

note = "Publisher Copyright: {\textcopyright} 2026 The Authors.",

year = "2026",

month = may,

doi = "10.1016/j.physletb.2026.140280",

language = "British English",

volume = "876",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Study of Higgs boson pair production in the HH→bb‾γγ final state with 308 fb−1 of data collected at s= 13 TeV and 13.6 TeV by the ATLAS experiment

AU - Ali, S.

AU - Anderson, A. C.

AU - Barakat, M.

AU - Cai, H.

AU - Chen, J.

AU - Chen, Z.

AU - Das, S. J.

AU - Didenko, A. R.

AU - Fan, K. Y.

AU - Francis, D.

AU - Fu, Y.

AU - Gao, Y.

AU - Guo, Y.

AU - Gupta, A.

AU - Haddad, A.

AU - Haleem, M.

AU - Hassan, S.

AU - Hirose, M.

AU - Huang, X.

AU - Jia, X.

AU - Jones, R. W.L.

AU - Khan, R. A.

AU - Kumar, M.

AU - Kumari, P.

AU - Li, B.

AU - Li, H.

AU - Li, K.

AU - Li, L.

AU - Li, R.

AU - Li, S.

AU - Li, T.

AU - Li, X.

AU - Li, Y.

AU - Li, Z.

AU - Liu, J. K.K.

AU - Liu, P.

AU - Liu, Q.

AU - Liu, Y.

AU - Liu, Z.

AU - Lu, Y. J.

AU - Martin, T. A.

AU - Martinez, M.

AU - Pan, J.

AU - Panwar, L.

AU - Parajuli, S.

AU - Shah, A. H.

AU - Sharma, A.

AU - Sharma, P.

AU - Shrestha, S.

AU - Singh, S.

AU - Soualah, R.

AU - Tian, Y.

AU - Usman, M.

AU - Wang, H.

AU - Wang, J.

AU - Wang, R.

AU - Wang, X.

AU - Wang, Y.

AU - Wang, Z.

AU - Wu, J.

AU - Xu, Y.

AU - Yan, S.

AU - Yang, H. J.

AU - Yang, X.

AU - Yang, Y.

AU - Zhang, D. F.

AU - Zhang, S.

AU - Zhang, T.

AU - Zhang, Y.

AU - Zhang, Z.

AU - Zhao, H.

AU - Zhao, Y.

AU - Zheng, Z.

AU - Zhou, B.

AU - Zhou, H.

AU - Zhou, Y.

AU - Zhu, J.

PY - 2026/5

Y1 - 2026/5

N2 - A search for Higgs boson pair production in the bb¯γγ final state is performed. The proton–proton collision dataset corresponds to an integrated luminosity of 308 fb−1, consisting of two samples, 140 fb−1 at a centre-of-mass energy of s=13TeV and 168 fb−1 at s=13.6TeV, recorded between 2015 and 2024 by the ATLAS detector at the CERN Large Hadron Collider. In addition to a larger dataset, this analysis improves upon the previous search in the same final state through several methodological and technical developments. The Higgs boson pair production cross section divided by the Standard Model prediction is found to be μHH=0.9−1.1+1.4 (μHH=1−1.0+1.3 expected), which translates into a 95% confidence-level upper limit of μHH ' 3.7. At the same confidence level the Higgs self-coupling modifier is constrained to be in the range −1.6'κλ'6.6 (−1.8'κλ'6.9 expected).

AB - A search for Higgs boson pair production in the bb¯γγ final state is performed. The proton–proton collision dataset corresponds to an integrated luminosity of 308 fb−1, consisting of two samples, 140 fb−1 at a centre-of-mass energy of s=13TeV and 168 fb−1 at s=13.6TeV, recorded between 2015 and 2024 by the ATLAS detector at the CERN Large Hadron Collider. In addition to a larger dataset, this analysis improves upon the previous search in the same final state through several methodological and technical developments. The Higgs boson pair production cross section divided by the Standard Model prediction is found to be μHH=0.9−1.1+1.4 (μHH=1−1.0+1.3 expected), which translates into a 95% confidence-level upper limit of μHH ' 3.7. At the same confidence level the Higgs self-coupling modifier is constrained to be in the range −1.6'κλ'6.6 (−1.8'κλ'6.9 expected).

KW - ATLAS

KW - B-jets

KW - Di-Higgs

KW - Photons

KW - Run 3

KW - Self-interaction

UR - https://www.scopus.com/pages/publications/105036668807

U2 - 10.1016/j.physletb.2026.140280

DO - 10.1016/j.physletb.2026.140280

M3 - Article

AN - SCOPUS:105036668807

SN - 0370-2693

VL - 876

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 140280

ER -

Study of Higgs boson pair production in the HH→bb‾γγ final state with 308 fb−1 of data collected at s= 13 TeV and 13.6 TeV by the ATLAS experiment

Abstract

Keywords

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