Baryogenesis from dark matter in an inflationary universe
We consider the possibility that in an inflationary universe, the inflaton field decays purely into the dark sector creating asymmetric dark matter at the end of inflation. This asymmetry is subsequently transmuted into leptons and baryons. We consider this possibility in the framework of a generic inflation model, and compute the amount of asymmetric dark matter created from the out of equilibrium decays of the inflaton with CP violating Yukawa couplings. The dark matter asymmetry is then transferred to the visible sector by the asymmetry transfer equation and generates an excess of $B-L$. Baryogenesis occurs via sphaleron processes which conserve $B-L$ but violate $B+L$. A mechanism for the annihilation of the symmetric component of dark matter is also discussed. The model leads to multi-component dark matter consisting of both bosonic and fermionic components.