A radiative neutrino mass model in light of DAMPE excess with hidden gauged $U(1)$ symmetry

We propose a one-loop induced neutrino mass model with hidden $U(1)$ gauge symmetry, in which we successfully involve a bosonic dark matter (DM) candidate propagating inside a loop diagram in neutrino mass generation to explain the $e^+e^-$ excess recently reported by the DArk Matter Particle Explorer (DAMPE) experiment. In our scenario dark matter annihilates into four leptons through $Z$ boson as DM DM $to Z Z (Z to ell^+ ell^-)$ and $Z$ decays into leptons via one-loop effect. We then investigate branching ratios of $Z$ taking into account lepton flavor violations and neutrino oscillation data.