Bahar Nikbakht

Department of Physics, Sharif University of Technology

Cosmic Inflation with Effective Serrated Potentials and PBHs

Abstract: Primordial black holes (PBHs) have attracted attention due to their potential roles in explaining phenomena such as dark matter and gravitational waves. These observations require that PBHs exist at various mass ranges.
We evaluated the inflaton potentials in which the modulation of the stochastic sequence of sharp step-like features on the slow-roll potential leads to the production of PBHs in different mass ranges. We first studied the cumulative effects of consecutive steps and showed that there exists a resonance mechanism that enhances the power spectrum of the specific wavelengths exponentially. We then examined the statistics of the PBHs and showed that, with the appropriate adjustments to the parameters, these models can account for the existence of the PBHs within the mass ranges allowed by the observations.

یکشنبه 29 خرداد 1401، ساعت 19:00

Sunday 19 June 2022 – 19:00 Tehran Time

اتاق سمینار مجازی –Virtual Seminar Room

https://vc.sharif.edu/ch/cosmology

گزینه ورود به صورت مهمان – Enter as a Guest