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

Abstract

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 → Z′ Z′ (Z′ → ℓ+ ℓ−) 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.