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Title: Primordial Black Holes from Supersymmetry in the Early Universe

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Sponsoring Org.:
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Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 3; Related Information: CHORUS Timestamp: 2017-07-21 22:11:00; Journal ID: ISSN 0031-9007
American Physical Society
Country of Publication:
United States

Citation Formats

Cotner, Eric, and Kusenko, Alexander. Primordial Black Holes from Supersymmetry in the Early Universe. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.119.031103.
Cotner, Eric, & Kusenko, Alexander. Primordial Black Holes from Supersymmetry in the Early Universe. United States. doi:10.1103/PhysRevLett.119.031103.
Cotner, Eric, and Kusenko, Alexander. 2017. "Primordial Black Holes from Supersymmetry in the Early Universe". United States. doi:10.1103/PhysRevLett.119.031103.
title = {Primordial Black Holes from Supersymmetry in the Early Universe},
author = {Cotner, Eric and Kusenko, Alexander},
abstractNote = {},
doi = {10.1103/PhysRevLett.119.031103},
journal = {Physical Review Letters},
number = 3,
volume = 119,
place = {United States},
year = 2017,
month = 7

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on July 21, 2018
Publisher's Accepted Manuscript

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  • In the context of grand unified theories of elementary particles, an era is predicted to have existed in the early universe during which superheavy nonrelativistic particles predominated. The minimum probability of primordial black hole formation during this stage is estimated and compared with astrophysical upper limits on the PBH density so as to impose constraints on the unified theories.
  • A model recently proposed by Hacyan for primordial black hole (PBH) growth in the early universe is extended to a class of equations of state p=a/sub s//sup 2/epsilon (p = pressure, a/sub s//sup 2/ = constant sound speed epsilon=energy density) and to arbitrary time delay between the births of the universe and of the PBH. We show that the PBH mass grows asymptotically in proportion to the horizon mass of the background for all a/sub s/, and that the general-relativistic matching to a flat background demands that the ingoing Vaidya metric used to model the PBH be self-similar. We emphasizemore » that this model is not in conflict with earlier work (Bicknell and Henriksen) that found no self-similar growth for a/sub s//sup 2/<1 because decompressive transitions were explicitly excluded there. Although formally correct for all a/sub s//sup 2/, we argue on physical grounds that only when a/sub s//sup 2/=1 is the present model liable to be realized.« less
  • The role of primordial black holes in the very early Universe under SU(3){times}SU(2){times}U(1), SU(5), and their supersymmetric counterparts is investigated. It is found that three of the four theories predict a phase, beginning around the Planck time and ending sometime on the order of ten to a hundred Planck times, in which black holes and radiation are comparable energy density. The fourth theory, SU(5), predicts a radiation-dominated model from the Planck era onward.
  • The growth of a black hole by radiation accretion in the early Universe is analyzed in the particular case in which the inflow of radiation is purely radial. This is done by generalizing the Einstein-Strauss vacuole model to the case of a radiation-filled universe. It is shown that, under this circumstance, the black hole tends to grow at the same rate as the particle horizon of the universe; this corresponds to an upper limit to the accretion rate.