Scientific Calendar Event



Starts 5 Oct 2021 16:00
Ends 5 Oct 2021 17:30
Central European Time
ZOOM Meeting
Please register in advance for this meeting at:

https://zoom.us/meeting/register/tJIlceisrz8qHNAkEYpRIkXaxSof1Fdg1UV2

After registering, you will receive a confirmation email containing information about joining the meeting.
Abstract. We consider the possibility that the majority of dark matter in our Universe consists of black holes of primordial origin. We examine the effects of stochastic inflation and an early matter-dominated era on the abundance of these black holes. We show that the power spectrum of comoving curvature perturbations computed in stochastic inflation matches the result obtained by solving the Mukhanov-Sasaki equation at the linear level, even in the presence of an ultra-slow-roll phase. We also find a significant reduction in the required tuning of the parameters of the inflationary potential in the matter-dominated scenario, in contrast to the standard case of formation during radiation domination. We show that the stochastic background of primordial gravitational waves resulting from this mechanism could be detected by future space-based observatories.