Non-Thermal Production of WIMPs, Cosmic $e^\pm$ Excesses and $\gamma$-rays from the Galactic Center

Understand

In this paper we propose a dark matter model and study aspects of its phenomenology.

• Our model is based on a new dark matter sector with a U(1)' gauge symmetry plus a discrete symmetry added to the Standard Model of particle physics.
• The new fields of the dark matter sector have no hadronic charges and couple only to leptons.
• Our model can not only give rise to the observed neutrino mass hierarchy, but can also generate the baryon number asymmetry via non-thermal leptogenesis.