Radiative Seesaw Model and DAMPE Excess from Leptophilic Gauge Symmetry

Abstract

In the light of the $e^{+}+e^{-}$ excess observed by DAMPE experiment, we propose an anomaly-free radiative seesaw model with an alternative leptophilic $U(1{)}_X$ gauge symmetry. In the model, only right-handed leptons are charged under $U(1{)}_X$ symmetry. The tiny Dirac neutrino masses are generated at one-loop level and charged leptons acquire masses though the type-I seesaw-like mechanism with heavy intermediate fermions. In order to cancel the anomaly, irrational $U(1{)}_X$ charge numbers are assigned to some new particles. After the spontaneous breaking of $U(1{)}_X$ symmetry, the dark $Z_2$ symmetry could appear as a residual symmetry such that the stability of inert particles with irrational charge numbers are guaranteed, naturally leading to stable DM candidates. We show that the Dirac fermion DM contained in the model can explain the DAMPE excess. Meanwhile, experimental constraints from DM relic density, direct detection, LEP and anomalous magnetic moments are satisfied.

17 pages, 5 figures, references added

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• TeV dark matter and the DAMPE electron excess
• EFT analysis of leptophilic dark matter at future electron-positron colliders in the mono-photon and mono-$Z$ channels
• Predictive Scotogenic Model with Flavor Dependent Symmetry
• Two-mediator dark matter models and cosmic electron excess
• A radiative neutrino mass model in light of DAMPE excess with hidden gauged $U(1)$ symmetry
• Interpretation of the cosmic ray positron and electron excesses with an annihilating-decaying dark matter scenario
• $U(1{)}_{B-3L_{\alpha }}$ Extended Scotogenic Models and Single-zero Textures of Neutrino Mass Matrices
• Neutrinos from the Sun can discover dark matter-electron scattering
• Verifiable type-III seesaw and dark matter in a gauged $\mathbf{U}(1{)}_{\mathrm{B}-\mathrm{L}}$ symmetric model
• Two-photon exchange in leptophilic dark matter scenarios
• Multicomponent Dark Matter in the Light of CALET and DAMPE