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

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      Creators
      Aad, G.
      Aggarwal, A.
      Caron, S.
      Groot, N. de
      Filthaut, F.
      Gottardo, C.A.
      Moskvitina, P.
      Nellist, C.
      Pedraza Diaz, L.
      Date of Archiving
      2022
      Archive
      HEPData
      DOI
      https://doi.org/10.17182/hepdata.107761
      Related publications
      Search for Higgs boson decays into a pair of pseudoscalar particles in the bbμμ final state with the ATLAS detector in pp collisions at √s = 13  TeV  
      Publication type
      Dataset
      Access level
      Open access
      Please use this identifier to cite or link to this item: https://hdl.handle.net/2066/247543   https://hdl.handle.net/2066/247543
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      Organization
      High Energy Physics
      Experimental High Energy Physics
      Audience(s)
      Physics
      Key words
      Higgs boson; pseudoscalar particles
      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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