Scientific article
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Evidence for the Dimuon Decay of the Higgs Boson in pp Collisions with the ATLAS Detector

ContributorsATLAS Collaboration
Published inPhysical review letters, vol. 135, no. 23, 231802
Publication date2025
First online date2025-12-03
Abstract

A search for the dimuon decay of the Higgs boson is presented based on pp collision data recorded by ATLAS during Run 3 of the Large Hadron Collider, corresponding to an integrated luminosity of 165  fb^{-1} at sqrt[s]=13.6  TeV. To enhance the sensitivity, the results are combined with those from Run 2. An excess of events over the background is observed with a significance of 3.4σ (2.5σ expected). The best-fit signal strength is μ=1.4±0.4. This result provides evidence for the H→μμ decay with ATLAS data and offers a direct probe of the Higgs-boson Yukawa coupling to second-generation fermions.

Funding
  • Institut National de Physique Nucléaire et de Physique des Particules
  • Karlsruhe Institute of Technology
  • Istituto Nazionale di Fisica Nucleare
  • Brookhaven National Laboratory
  • Agencia Nacional de Promoción Científica y Tecnológica
  • Australian Research Council
  • Bundesministerium für Wissenschaft, Forschung und Wirtschaft
  • Austrian Science Fund
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico
  • Fundação de Amparo à Pesquisa do Estado de São Paulo
  • Natural Sciences and Engineering Research Council of Canada
  • National Research Council Canada
  • Canada Foundation for Innovation
  • Agencia Nacional de Investigación y Desarrollo
  • Chinese Academy of Sciences
  • Ministry of Science and Technology of the People’s Republic of China [MOST-2023YFA1605700]
  • National Natural Science Foundation of China [12175119]
  • Ministerstvo Školství, Mládeže a Tělovýchovy
  • Danmarks Grundforskningsfond
  • Centre National de la Recherche Scientifique
  • Commissariat à l’Énergie Atomique et aux Énergies Alternatives
  • Bundesministerium für Bildung und Forschung
  • Helmholtz-Gemeinschaft
  • Max-Planck-Gesellschaft
  • General Secretariat for Research and Innovation
  • Israel Academy of Sciences and Humanities
  • Ministry of Education, Culture, Sports, Science and Technology
  • Japan Society for the Promotion of Science [JP22H01227]
  • Centre National pour la Recherche Scientifique et Technique
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek [Veni 2020–VI.Veni.202.179]
  • Fundação para a Ciência e a Tecnologia
  • Institutul de Fizică Atomică
  • Javna Agencija za Raziskovalno Dejavnost RS
  • National Research Foundation
  • Ministerio de Ciencia e Innovación [PCI2022-135018-2]
  • Vetenskapsrådet [VR 2021-03651]
  • Knut och Alice Wallenbergs Stiftelse [KAW 2018.0458]
  • Türkiye Enerji, Nükleer ve Maden Araştırma Kurumu
  • U.S. Department of Energy [DE-AC02-76SF00515]
  • British Columbia Knowledge Development Fund
  • Horizon 2020 Framework Programme [MUCCA–CHIST-ERA-19-XAI-00]
  • Ministero dell’Istruzione, dell’Università e della Ricerca [I53D23000820006]
  • Deutsche Forschungsgemeinschaft [469666862]
  • Alexander von Humboldt-Stiftung
  • European Social Fund
  • United States-Israel Binational Science Foundation
  • Narodowe Centrum Nauki [2021/42/E/ST2/00350]
  • Narodowa Agencja Wymiany Akademickiej
  • “la Caixa” Foundation
  • Centres de Recerca de Catalunya
  • Generalitat de Catalunya
  • Generalitat Valenciana [IDIFEDER/2018/048]
  • Göran Gustafssons Stiftelser
  • Royal Society [NIF-R1-231091]
  • Leverhulme Trust [RPG-2020-004]
  • Fondo Nacional de Desarrollo Científico y Tecnológico [1230812]
  • Grantová Agentura České Republiky [GACR—24-11373S]
  • Ministry of Education, Youth and Science [ERC-CZ-LL2327]
  • BARD [101116429]
  • Baden-Württemberg Stiftung
  • Norges Forskningsråd [RCN-314472]
  • Ministerstwo Edukacji i Nauki [9722]
  • Carl Tryggers Stiftelse för Vetenskaplig Forskning [22:2312]
  • Neubauer Family Foundation
  • NDGF, Denmark, Norway, Sweden
  • NL-T1, Netherlands
  • RAL, United Kingdom
  • YerPhI, , Armenia
  • Minciencias, Colombia
  • DNSRC, Denmark
  • SRNSFG, Georgia
  • ICHEP, Israel
  • MNiSW
  • MESTD
  • Cantons of Bern and Geneva
  • Investissements d’ Avenir Labex
  • MINERVA
  • Italian Center for High Performance Computing
  • Big Data and Quantum Computing
  • European Commission - REAL-time discovery strategies for DARK matter and dark sector signals at the ATLAS detector with Run-3 LHC data [101002463]
  • European Commission - Machine learning for Sciences and Humanities [101081355]
  • French National Research Agency (ANR) - Advanced TRacking Algorithms for Particle Physics [ANR-21-CE31-0022]
  • Swiss National Science Foundation - Turning noise into data: a discovery strategy for new weakly-interacting physics [194658]
Citation (ISO format)
ATLAS Collaboration. Evidence for the Dimuon Decay of the Higgs Boson in pp Collisions with the ATLAS Detector. In: Physical review letters, 2025, vol. 135, n° 23, p. 231802. doi: 10.1103/gzdh-p159
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Article (Published version)
Identifiers
Additional URL for this publicationhttps://link.aps.org/doi/10.1103/gzdh-p159
Journal ISSN0031-9007
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