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<p>We investigate the dimuon Higgs decay <i>h</i> → <i>μ</i><sup>+</sup><i>μ</i><sup><i>−</i></sup> in the context of an extended Scotogenic model. The model introduces a singlet complex scalar in addition to the standard Scotogenic scalar doublet and singlet fermions, charged under a dark ℤ<sub>2</sub> symmetry. By exploring the one-loop contributions, we show that the model allows for sizable deviations in the Higgs dimuon decay rate, quantified by the quotient <i>R</i><sub><i>μμ</i></sub> = Br(<i>h</i> → <i>μ</i><sup>+</sup><i>μ</i><sup><i>−</i></sup>)<i>/</i>Br(<i>h</i> → <i>μ</i><sup>+</sup><i>μ</i><sup><i>−</i></sup>)<sub>SM</sub>. Crucially, these deviations comply with experimental limits, including those on Br(<i>μ</i><sup>+</sup> → <i>e</i><sup>+</sup><i>γ</i>) and Br(<i>h</i> → <i>γγ</i>). Such deviations can be tested and constrained by future precision measurements at the LHC.</p>

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Exploring dimuon Higgs decay in an extended Scotogenic model

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月17日

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  • Pablo Escribano,
  • Víctor Martín Lozano,
  • Sebastián Norero,
  • Avelino Vicente

摘要

We investigate the dimuon Higgs decay h → μ+μ− in the context of an extended Scotogenic model. The model introduces a singlet complex scalar in addition to the standard Scotogenic scalar doublet and singlet fermions, charged under a dark ℤ2 symmetry. By exploring the one-loop contributions, we show that the model allows for sizable deviations in the Higgs dimuon decay rate, quantified by the quotient Rμμ = Br(h → μ+μ−)/Br(h → μ+μ−)SM. Crucially, these deviations comply with experimental limits, including those on Br(μ+ → e+γ) and Br(h → γγ). Such deviations can be tested and constrained by future precision measurements at the LHC.