Search for doubly charged Higgs boson production in multi-lepton final states using 139 fb−1 of proton–proton collisions at √ s = 13 TeV with the ATLAS detector
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Aad, G., Abbott, B., Abbott, D.C. et al. Search for doubly charged Higgs boson production in multi-lepton final states using 139 fb of proton–proton collisions at = 13 TeV with the ATLAS detector. Eur. Phys. J. C 83, 605 (2023). [https://doi.org/10.1140/epjc/s10052-023-11578-9]
SponsorshipANPCyT; YerPhI, Armenia; Australian Research Council; BMWFW, Austria; Austrian Science Fund (FWF); Azerbaijan National Academy of Sciences (ANAS); Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ); Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); Natural Sciences and Engineering Research Council of Canada (NSERC); Canada Foundation for Innovation; National Natural Science Foundation of China (NSFC); MEYS CR, Czech Republic; National Research Foundation of Korea; Danish Natural Science Research Council; Centre National de la Recherche Scientifique (CNRS); CEA-DRF/IRFU, France; Federal Ministry of Education & Research (BMBF); Max Planck Society; Hong Kong SAR, China; Israel Science Foundation; Istituto Nazionale di Fisica Nucleare (INFN); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science; CNRST, Morocco; RCN, Norway; MEiN, Poland; Fundacao para a Ciencia e a Tecnologia (FCT); MNE/IFA, Romania; Ministry of Education, Science & Technological Development, Serbia; MSSR, Slovakia; Slovenian Research Agency - Slovenia; MIZS, Slovenia; Spanish Government; Wallenberg Foundation, Sweden; SERI, Switzerland; Ministry of Science and Technology, Taiwan; United States Department of Energy (DOE); National Science Foundation (NSF); BCKDF, Canada; CANARIE, Canada; Compute Canada, Canada; Czech Republic Government PRIMUS 21/SCI/017 UNCE SCI/013; COST, European Union; European Union (EU) European Research Council (ERC); Horizon 2020, European Union; European Union (EU) Marie Curie Actions; Agence Nationale de la Recherche (ANR); German Research Foundation (DFG); Alexander von Humboldt Foundation; Herakleitos programme - EU-ESF, Greece; Thales Group; Aristeia programme - EU-ESF, Greece; Greek NSRF, Greece; BSF-NSF, Israel; MINERVA, Israel; Norwegian Financial Mechanism 2014-2021, Norway; NCN, Poland; Polish National Agency for Academic Exchange (NAWA); La Caixa Banking Foundation, Spain; CERCA Programme Generalitat de Catalunya, Spain; GenT Programme Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; Royal Society; Leverhulme Trust; UK Research & Innovation (UKRI) Science & Technology Facilities Council (STFC); TENMAK, Turkiye; Canton of Geneva, Switzerland; Canton of Bern, Switzerland; Swiss National Science Foundation (SNSF); SRC, Sweden; DSI/NRF, South Africa; Netherlands Organization for Scientific Research (NWO) Netherlands Government; Benoziyo Center, Israel; RGC, China; GSRI, Greece; HGF, Germany; SRNSFG, Georgia; Minciencias, Colombia; Ministry of Science and Technology, China; Chinese Academy of Sciences
A search for pair production of doubly charged Higgs bosons (H±±), each decaying into a pair of prompt, isolated, and highly energetic leptons with the same electric charge, is presented. The search uses a proton–proton collision data sample at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 139 fb−1 recorded by the ATLAS detector during Run 2 of the Large Hadron Collider (LHC). This analysis focuses on same-charge leptonic decays, H±± → ± ± where , = e,μ, τ, in two-, three-, and four-lepton channels, but only considers final states which include electrons or muons. No evidence of a signal is observed. Corresponding upper limits on the production cross-section of a doubly charged Higgs boson are derived, as a function of its mass m(H±± ), at 95% confidence level. Assuming that the branching ratios to each of the possible leptonic final states are equal, B(H±± → e±e± ) = B(H±± → e± μ ± ) = B(H±± → μ ± μ ± ) = B(H±± → e± τ ± ) = B(H±± → μ ± τ ± ) = B(H±± → τ ± τ ± ) = 1/6, the observed (expected) lower limit on the mass of a doubly charged Higgs boson is 1080GeV(1065 GeV) within the leftright symmetric type-II seesaw model, which is the strongest limit to date produced by the ATLAS Collaboration. Additionally, this paper provides the first direct test of the Zee– Babu neutrino mass model at the LHC, yielding an observed (expected) lower limit of m(H±± ) = 900 GeV (880 GeV).