Primordial Black Hole Formation in a Double Inflation Model in Supergravity

Details Primordial Black Hole Formation in a Double Inflation Model in Supergravity Primordial Black Hole Formation in a Double Inflation Model in Supergravity

1997-10-07

arxiv.org/abs/hep-ph/9710259v2

Phys.Rev.D57:6050-6056,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages (RevTeX file), KUNS-1470

Scientific paper

10.1103/PhysRevD.57.6050

It has been recently pointed out that the initial value problem in new inflation models is naturally solved by supergravity effects if there exists a pre-inflation before the new inflation. We study this double inflation model in details and find that density fluctuations on small cosmological scales are much larger than those on large scales due to peculiar property of the new inflation. We show that this results in production of primordial black holes which have $\sim 1 M_{\odot}$ masses in a certain parameter region of the double inflation model. We stress that these black holes may be identified with MACHOs observed in the halo of our galaxy.

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