Search for Higgs boson decays into a pair of pseudoscalar particles in the bb mu mu final state with the ATLAS detector in pp collisions at root s=13 TeV

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URI: http://hdl.handle.net/10481/73006
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Author
Aad, G.; Aguilar Saavedra, Juan Antonio; Rodríguez Chala, Mikael; Atlas Collaboration
Editorial
American Physical Society
Date
2022-01-11
Referencia bibliográfica
Aad, G... [et al.] (2022). Search for Higgs boson decays into a pair of pseudoscalar particles in the b b μ μ final state with the ATLAS detector in p p collisions at s= 13 TeV. Physical Review D, 105(1), 012006. DOI: [10.1103/PhysRevD.105.012006]
Sponsorship
ANPCyT; YerPhI, Armenia; Australian Research Council; BMWFW, Austria Austrian Science Fund (FWF); Azerbaijan National Academy of Sciences (ANAS); SSTC, Belarus; 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) NRC, Canada Canada Foundation for Innovation; CERN; ANID, Chile; Chinese Academy of Sciences Ministry of Science and Technology, China National Natural Science Foundation of China (NSFC); Minciencias, Colombia; Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government; DNRF, Denmark Danish Natural Science Research Council; Centre National de la Recherche Scientifique (CNRS) CEA-DRF/IRFU, France; SRNSFG, Georgia; Federal Ministry of Education & Research (BMBF) HGF, Germany Max Planck Society; GSRI, Greece; RGC, China Hong Kong SAR, China; Israel Science Foundation Benoziyo Center, Israel; Istituto Nazionale di Fisica Nucleare (INFN); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science; CNRST, Morocco; Netherlands Organization for Scientific Research (NWO) Netherlands Government; RCN, Norway; MEiN, Poland; FCT, Portuga; MNE/IFA, Romania; JINR; Russian Federation NRC KI, Russian Federation; Ministry of Education, Science & Technological Development, Serbia; MSSR, Slovakia; Slovenian Research Agency - Slovenia MIZS, Slovenia; DSI/NRF, South Africa; Spanish Government; SRC, Sweden Wallenberg Foundation, Sweden; SERI, Switzerland Swiss National Science Foundation (SNSF) Canton of Bern, Switzerland; Ministry of Science and Technology, Taiwan; Ministry of Energy & Natural Resources - Turkey; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC); United States Department of Energy (DOE); National Science Foundation (NSF); BCKDF, Canada CANARIE, Canada Compute Canada, Canada CRC, Canada; COST, European Union European Research Council (ERC) ERDF, European Union Horizon 2020, European Union Marie Sklodowska-Curie Actions, European Union; French National Research Agency (ANR); German Research Foundation (DFG) Alexander von Humboldt Foundation; EU-ESF, Greece Greek NSRF, Greece; BSF-NSF, Israel German-Israeli Foundation for Scientific Research and Development; 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 PROMETEO Programme Generalitat Valenciana, Spain GenT Programme Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; Royal Society of London; Leverhulme Trust; Canton of Geneva, Switzerland; Herakleitos programme Thales Group Aristeia programme
Abstract
This paper presents a search for decays of the Higgs boson with a mass of 125 GeV into a pair of new pseudoscalar particles, H -> aa, where one a-boson decays into a b-quark pair and the other into a muon pair. The search uses 139 fb(-1) of proton-proton collision data at a center-of-mass energy root s = 13 TeV recorded between 2015 and 2018 by the ATLAS experiment at the LHC. A narrow dimuon resonance is searched for in the invariant mass spectrum between 16 GeV and 62 GeV. The largest excess of events above the Standard Model backgrounds is observed at a dimuon invariant mass of 52 GeV and corresponds to a local (global) significance of 3.3 sigma (1.7 sigma). Upper limits at 95% confidence level are placed on the branching ratio of the Higgs boson to the bb mu mu final state, beta(H -> aa -> bb mu mu), and are in the range 0.2-4.0 x 10(-4), depending on the signal mass hypothesis.
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Except where otherwise noted, this item's license is described as Atribución 3.0 España