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High Energy Physics - Phenomenology

arXiv:hep-ph/9807544 (hep-ph)
[Submitted on 30 Jul 1998 (v1), last revised 18 Dec 1998 (this version, v3)]

Title:Primordial Black Hole Formation in Supergravity

Authors:M. Kawasaki, T. Yanagida
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Abstract: We study a double inflation model (a preinflation + a new inflation) in supergravity and discuss the formation of primordial black holes which may be identified with massive compact halo objects (MACHOs) observed in the halo of our galaxy. The preinflation drives an inflaton for the new inflation close to the origin through supergravity effects and the new inflation naturally occurs. If the total e-fold number of the new inflation is smaller than $\sim 60$, both inflations produce cosmologically relevant density fluctuations. If the coherent inflaton oscillation after the preinflation continues until the beginning of the new inflation, density fluctuations on small cosmological scales can be set suitably large to produce black holes MACHOs of masses $\sim 1 M_{\odot}$ in a wide region of parameter space in the double inflation model.
Comments: 15pages (RevTeX file), final version to be published in Phys. Rev. D
Subjects: High Energy Physics - Phenomenology (hep-ph); Astrophysics (astro-ph)
Cite as: arXiv:hep-ph/9807544
  (or arXiv:hep-ph/9807544v3 for this version)
  https://doi.org/10.48550/arXiv.hep-ph/9807544
Journal reference: Phys.Rev.D59:043512,1999
Related DOI: https://doi.org/10.1103/PhysRevD.59.043512

Submission history

From: Masahiro Kawasaki [view email]
[v1] Thu, 30 Jul 1998 06:33:14 UTC (15 KB)
[v2] Fri, 31 Jul 1998 08:01:22 UTC (15 KB)
[v3] Fri, 18 Dec 1998 01:28:44 UTC (15 KB)
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