http://arxiv.org/abs/2211.11980
The growing evidence of gravitational waves from binary black hole mergers has renewed the interest in study of primordial black holes (PBH). Here we study a mechanism for the formation of PBH from collapse of pseudo-topological domain walls which form out of equilibrium during inflation and then collapse post inflation. We apply the study to domain wall formation due to $D$-parity embedded in a supersymmetric grand unified theory (GUT) based on $SO(10)$ and compare the abundance of resulting PBH with the existing constraints. Thus the macroscopic relics can then be used to constrain or rule out a GUT, or demand a refinement of the theory of PBH formation in this class of GUTs.
S. Mishra and U. Yajnik
Wed, 23 Nov 22
32/71
Comments: 16 pages, 4 figures