AUTHOR=Nikulin Valery V. , Krasnov  Maxim A. , Rubin  Sergey G. 

TITLE=Compact extra dimensions as the source of primordial black holes

JOURNAL=Frontiers in Astronomy and Space Sciences

VOLUME=Volume 9 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2022.927144

DOI=10.3389/fspas.2022.927144

ISSN=2296-987X

ABSTRACT=We discuss the model of the primordial black holes formation at the reheating stage. These small massive black holes appear due to specific properties of the compact extra dimensions. The latter gives rise the low energy model containing the effective scalar field potential capable for the  domain walls production.  Formed during inflation, these walls are quite dense so they collapse soon after inflation ends. The discussion is performed within the scope of multidimensional $f(R)$-gravity