\begin{document}$10\sim 60\;{\rm{GeV}}$\end{document}) singlet-dominated (pseudo)scalars (hereafter, in this paper, we use "scalar" for both scalars and pseudoscalars, considering pseudoscalars can also be called CP-odd scalars). This condition can be classified into three scenarios according to the identitiesof the SM-like Higgs and the light scalar: (i) the light scalar is CP-odd, and the SM-like Higgs is \begin{document}$h_2$\end{document}; (ii) the light scalar is CP-odd, and the SM-like Higgs is \begin{document}$h_1$\end{document}; and (iii) the light scalar is CP-even, and the SM-like Higgs is \begin{document}$h_2$\end{document}. In this work, we compare the three scenarios, checking the interesting parameter regions that lead to the scenarios, the mixing levels of the doublets and singlets, the tri-scalar coupling between the SM-like Higgs and a pair of light scalars, the branching ratio of Higgs decay to the light scalars, and sensitivities in the detection of the exotic decay at the HL-LHC and future lepton colliders such as CEPC, FCC-ee, and ILC. Finally, several interesting conclusions are drawn, which are useful for understanding the different delicate mechanisms of the exotic decay and designing colliders in future."> Higgs decay to light (pseudo)scalars in the semi-constrained NMSSM -
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