Search for exotic decays of the Higgs boson to a pair of pseudoscalars in the μ μ b b and τ τ b b final states.

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  • Additional Information
    • Corporate Authors:
      CMS Collaboration
    • Source:
      Publisher: EDP Sciences Country of Publication: France NLM ID: 101622319 Publication Model: Print-Electronic Cited Medium: Print ISSN: 1434-6044 (Print) Linking ISSN: 14346044 NLM ISO Abbreviation: Eur Phys J C Part Fields Subsets: PubMed not MEDLINE
    • Publication Information:
      Original Publication: [Les Ulis, France] : Heidelberg, Germany : EDP Sciences ; Springer, [1998-]
    • Abstract:
      A search for exotic decays of the Higgs boson ( H ) with a mass of 125 Ge V to a pair of light pseudoscalars a 1 is performed in final states where one pseudoscalar decays to two b quarks and the other to a pair of muons or τ leptons. A data sample of proton-proton collisions at s = 13 Te V corresponding to an integrated luminosity of 138 fb - 1 recorded with the CMS detector is analyzed. No statistically significant excess is observed over the standard model backgrounds. Upper limits are set at 95% confidence level ( CL ) on the Higgs boson branching fraction to μ μ b b and to τ τ b b , via a pair of a 1 s. The limits depend on the pseudoscalar mass m a 1 and are observed to be in the range (0.17-3.3)  × 10 - 4 and (1.7-7.7)  × 10 - 2 in the μ μ b b and τ τ b b final states, respectively. In the framework of models with two Higgs doublets and a complex scalar singlet (2HDM+S), the results of the two final states are combined to determine upper limits on the branching fraction B ( H → a 1 a 1 → ℓ ℓ b b ) at 95% CL , with ℓ being a muon or a τ lepton. For different types of 2HDM+S, upper bounds on the branching fraction B ( H → a 1 a 1 ) are extracted from the combination of the two channels. In most of the Type II 2HDM+S parameter space, B ( H → a 1 a 1 ) values above 0.23 are excluded at 95% CL for m a 1 values between 15 and 60 Ge V .
      Competing Interests: Conflict of interestThe authors declare that they have no conflict of interest.
      (© The Author(s) 2024.)
    • References:
      Eur Phys J C Part Fields. 2020;80(1):4. (PMID: 31976986)
      Phys Rev Lett. 2006 Jan 13;96(1):011802. (PMID: 16486438)
      Eur Phys J C Part Fields. 2021;81(9):800. (PMID: 34781320)
      Nature. 2022 Jul;607(7917):60-68. (PMID: 35788190)
      Phys Rev Lett. 2022 Feb 25;128(8):081805. (PMID: 35275660)
      Phys Rev Lett. 2015 May 15;114(19):191803. (PMID: 26024162)
      Eur Phys J C Part Fields. 2017;77(10):663. (PMID: 31997920)
      Eur Phys J C Part Fields. 2014;74(10):3076. (PMID: 25814871)
      Nature. 2022 Jul;607(7917):52-59. (PMID: 35788192)
      Phys Rev Lett. 2014 Jun 6;112(22):221803. (PMID: 24949758)
    • Publication Date:
      Date Created: 20240517 Latest Revision: 20240619
    • Publication Date:
      20240619
    • Accession Number:
      PMC11093753
    • Accession Number:
      10.1140/epjc/s10052-024-12727-4
    • Accession Number:
      38757620