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

ATLAS Collaboration

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

ATLAS Collaboration

Institute of Higher Research

Aix-Marseille Université and CNRS/IN2P3
University of Bergen
University of Oklahoma
New York University Abu Dhabi
University of Göttingen
TU Dortmund University
United States Department of Energy
Southern Methodist University
Mohammed V University in Rabat
Tel Aviv University
New York University
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
Heidelberg University
IN2P3
AGH University of Krakow
SLAC National Accelerator Laboratory
University of Manchester
Northern Illinois University
Istanbul University
Rutherford Appleton Laboratory
University of California at Santa Cruz
The University of Chicago
Institute for High Energy Physics
Johannes Gutenberg University Mainz
Alexandru Ioan Cuza University of Iaşi
CERN
Royal Holloway University of London
Zhengzhou University
University of Rome Tor Vergata
University of Valencia
University of Hassan II Casablanca
Lund University
Stony Brook University
Waseda University
University of Bonn
University of Würzburg
University of Victoria BC
University of Bern
Université Grenoble Alpes
University of Edinburgh
Oklahoma State University
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
University of Geneva
University of Warwick
Czech Technical University in Prague
Lancaster University
The California State University
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University of Johannesburg
Université Paris-Saclay
University of Sussex
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University of Naples Federico II
Universidad Nacional de La Plata
University of Washington
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McGill University
Ludwig Maximilian University of Munich
Sorbonne Université
University of Michigan, Ann Arbor
University of Freiburg
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Laboratório de Instrumentação e Física Experimental de Partículas
Aristotle University of Thessaloniki
High Energy Accelerator Research Organization, Tsukuba
University of Sheffield
University of Texas at Austin
University of Glasgow
University of Milan
National and Kapodistrian University of Athens
Columbia University
The University of Tokyo
German Electron Synchrotron
Universidad de Buenos Aires
Brandeis University
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Duke University
University of Montreal
University of Rome La Sapienza
Nagoya University
Ochanomizu University
A. Alikhanian Yerevan Institute of Physics
Comenius University
University of California at Irvine
University of Cape Town
Mohammed VI Polytechnic University
University of Pennsylvania
Université Clermont Auvergne
Queen Mary University of London
Slovak Academy of Sciences
Carleton University
Technische Universität Dresden
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University of Oregon
Yale University
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University of Texas at Arlington
University of Bologna
University of Cambridge
United Arab Emirates University
University of Pittsburgh
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University of California at Berkeley
University of Amsterdam
Max Planck Institute for Physics (Werner Heisenberg Institute)
Charles University
University of Science and Technology of China
University of Oxford
University College London
Universidad Autónoma de Madrid
CAS - Institute of High Energy Physics
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Indiana University Bloomington
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Ohio State University
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Stockholm University
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Radboud University Nijmegen
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CSIC - Institute of Microelectronics of Barcelona
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Demokritos National Centre for Scientific Research
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University of Alberta
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West University of Timisoara
Sun Yat-Sen University
Shinshu University
The University of Osaka
University of Tsukuba
National University of Science and Technology POLITEHNICA Bucharest
Azerbaijan National Academy of Sciences
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Georgian Academy of Sciences E. Andronikashvili Institute of Physics
Institute of Science Tokyo
Technion-Israel Institute of Technology
University of the Witwatersrand
Iowa State University
Universidad Andrés Bello
Kobe University
Universidade de São Paulo
Hong Kong University of Science and Technology
University of Iowa
Kyushu University
Mohamed I University
Universidad Antonio Nariño
iThemba Laboratory for Accelerator Based Sciences
The University of Sydney
Transilvania University of Brasov
National Institute for Research and Development of Isotopic and Molecular Technologies
Universidad de Tarapacá
University of West Attica
Khalifa University of Science and Technology
Justus Liebig University Giessen
TOBB University of Economics and Technology
Universidad San Sebastián
Tokyo Metropolitan University

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

5 Scopus citations

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	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{04e3d96ca10647ddabe976308864e4c1,

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{\textendash}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 = "G. Aad and E. Aakvaag and B. Abbott and S. Abdelhameed and S. Kabana and \{ATLAS Collaboration\}",

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

year = "2026",

month = may,

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

language = "English",

volume = "876",

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

issn = "0370-2693",

}

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 - Aad, G.

AU - Aakvaag, E.

AU - Abbott, B.

AU - Abdelhameed, S.

AU - Kabana, S.

AU - ATLAS Collaboration

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

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Keywords

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