발표 초록: In this talk, I consider scalar/fermion DM models with local dark U(1)_X gauge symmetry that is spontaneously broken into its Z_2 subgroup. In this model, dark Higgs boson plays a crucial role in DM phenomenology, not only for generation of dark photon mass, but also opening new channels for DM pair annihilations into the final states involving dark Higgs boson. I will discuss two examples, XENON1T and muon g-2 anomalies. Especially, in the case of U(1)_X =U(1)_{L_\mu-L_\tau} model, dark Higgs boson will dissect the strong correlation M_{Z′} ∼ 2M_{DM}, and much wider mass range is allowed for U(1)_X-charged complex scalar and Dirac fermion DM, still explaining the muon (g − 2).
