Baryon Asymmetry, Dark Matter, and Density Perturbation from PBH
  We investigate the consistency of a scenario in which the baryon asymmetry, dark matters, as well as the cosmic density perturbation are generated simultaneously through the evaporation of primordial black holes (PBHs). This scenario can explain the coincidence of the dark matter and the baryon density of the universe, and is free from the isocurvature perturbation problem. We show that this scenario predicts the masses of PBHs, right-handed neutrinos and dark matters, the Hubble scale during inflation, the non-gaussianity and the running of the spectral index. We also discuss the testability of the scenario by detecting high frequency gravitational waves from PBHs. 
Tomohiro Fujita, Keisuke Harigaya, Masahiro Kawasaki, Ryo Matsuda
astro-ph.CO hep-ph