We study the SM-like Higgs boson decays h→ MZ in the Triplet extended NMSSM (TNMSSM),where M is a vector meson (ρ, ω, φ, J/Ψ, Υ). Compared to the minimal supersymmetric standard model (MSSM), the TNMSSM includes two new SU(2) triplets with hypercharge ± 1 and a SM gauge singlet which are coupled to each other. The indirect contributions to the decays h → MZ are produced from the effective hγ Z vertex, and they are more important than the direct contributions. The results of this work would encourage a detection on h → Zγ at the future high energy colliders for exploring new physics beyond the SM.
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Hu et al. (2024) studied this question.
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