| Abstract: |
I will discuss the possibility that a period of constant-roll inflation could produce primordial black holes (PBH), via an increase of the primordial power spectrum. Indeed, constant-roll can accommodate different values for the tilt of the scalar power spectrum, in particular a blue tilt, which would help reaching the PBH formation threshold. As a concrete realization, we have constructed a model with a stage of constant-roll placed between two slow-roll stages, and have shown that it could generate PBH at different scales, while satisfying observational constraints--in particular CMB ones. |
