Probing Unified Origin of Dark Matter and Baryon Asymmetry at PAMELA/Fermi

Abstract

We propose an unified model of dark matter and baryon asymmetry in a lepto-philic world above the electroweak scale. We provide an example where the inflaton decay products subsequently generate a lepton asymmetry and a dark matter abundance with an unique coupling in the early universe, while the present day decay of the dark matter through the same coupling gives rise the observed cosmic ray anomalies at PAMELA and Fermi Large Area Telescope.

Comments: 6 pages (minor revision), revtex, 3 figures