Speaker
Pietro Conzinu
(University of Pisa & INFN)
Description
I will discuss the possibility of producing a significant fraction of dark matter in the form of primordial black holes (PBHs) in the context of the pre-big bang scenario. To this purpose, we consider the enhancement of curvature perturbations possibly induced by a variation of the sound-speed parameter c_s that emerges naturally due to higher-order string corrections. We describe the production both in radiation and in matter dominated era.
Primary author
Pietro Conzinu
(University of Pisa & INFN)
