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

TL;DR

This paper introduces a one-loop neutrino mass model with a hidden $U(1)$ symmetry that explains DAMPE's electron-positron excess through dark matter annihilation involving a $Z'$ boson decaying into leptons.

Contribution

It presents a novel one-loop neutrino mass model incorporating a hidden $U(1)$ gauge symmetry and a dark matter candidate that accounts for DAMPE's excess via $Z'$ mediated lepton production.

Findings

Dark matter annihilates into four leptons via $Z'$ boson.

Branching ratios of $Z'$ are consistent with lepton flavor violation constraints.

Model aligns with neutrino oscillation data.

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 $\to Z' Z' (Z' \to \ell^+ \ell^-)$ 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.