Baryon asymmetry from primordial black holes
  We propose a new scenario of the baryogenesis from primordial black holes
(PBH). Assuming presence of microscopic baryon (or lepton) number violation and
a CP violating operator such as $\partial_\alpha F(\mathcal{R_{....}} )
J^\alpha$, where $F(\mathcal{R_{....}})$ is a scalar function of the Riemann
tensor, time evolution of an evaporating black hole generates baryonic
(leptonic) chemical potential at the horizon; consequently PBH enumerates
asymmetric Hawking radiation between baryons (leptons) and anti-baryons
(leptons). Though the operator is higher dimensional and largely suppressed by
a high mass scale $M_*$, we show that sufficient amount of asymmetry can be
generated for a wide range of parameters of the PBH mass $M_{\rm PBH}$, its
abundance $\Omega_{\rm PBH}$, and the scale $M_*$.
