Primordial black holes as dark matter in supergravity inflation models

Masahiro Kawasaki, Alexander Kusenko, Yuichiro Tada, Tsutomu T. Yanagida
2016 Physical Review D  
We propose a novel scenario to produce abundant primordial black holes (PBHs) in new inflation which is a second phase of a double inflation in the supergravity frame work. In our model, some preinflation phase before the new inflation is assumed and it would be responsible for the primordial curvature perturbations on the cosmic microwave background scale, while the new inflation produces only the small scale perturbations. Our new inflation model has linear, quadratic, and cubic terms in its
more » ... otential and PBH production corresponds with its flat inflection point. The linear term can be interpreted to come from a supersymmetry-breaking sector, and with this assumption, the vanishing cosmological constant condition after inflation and the flatness condition for the inflection point can be consistently satisfied.
doi:10.1103/physrevd.94.083523 fatcat:edu2jzkqc5hg7kbuzg522oaxkq