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Title: Microscopic primordial black holes and extra dimensions

Abstract

We examine the production and evolution of microscopic black holes in the early universe in the large extra dimensions scenario. We demonstrate that, unlike in the standard four-dimensional cosmology, in large extra dimensions absorption of matter from the primordial plasma by the black holes is significant and can lead to rapid growth of the black hole mass density. This effect can be used to constrain the conditions present in the very early universe. We demonstrate that this constraint is applicable in regions of parameter space not excluded by existing bounds.

Authors:
;  [1]
  1. Stanford Linear Accelerator Center, 2575 Sand Hill Road, Menlo Park, California 94025 (United States)
Publication Date:
OSTI Identifier:
21011071
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevD.75.044006; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ABSORPTION; BLACK HOLES; COSMOLOGICAL MODELS; COSMOLOGY; DENSITY; FOUR-DIMENSIONAL CALCULATIONS; MANY-DIMENSIONAL CALCULATIONS; MASS; UNIVERSE

Citation Formats

Conley, John, and Wizansky, Tommer. Microscopic primordial black holes and extra dimensions. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.044006.
Conley, John, & Wizansky, Tommer. Microscopic primordial black holes and extra dimensions. United States. doi:10.1103/PHYSREVD.75.044006.
Conley, John, and Wizansky, Tommer. Thu . "Microscopic primordial black holes and extra dimensions". United States. doi:10.1103/PHYSREVD.75.044006.
@article{osti_21011071,
title = {Microscopic primordial black holes and extra dimensions},
author = {Conley, John and Wizansky, Tommer},
abstractNote = {We examine the production and evolution of microscopic black holes in the early universe in the large extra dimensions scenario. We demonstrate that, unlike in the standard four-dimensional cosmology, in large extra dimensions absorption of matter from the primordial plasma by the black holes is significant and can lead to rapid growth of the black hole mass density. This effect can be used to constrain the conditions present in the very early universe. We demonstrate that this constraint is applicable in regions of parameter space not excluded by existing bounds.},
doi = {10.1103/PHYSREVD.75.044006},
journal = {Physical Review. D, Particles Fields},
number = 4,
volume = 75,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}
  • We examine the production and evolution of microscopic black holes in the early universe in the large extra dimensions scenario. We demonstrate that, unlike in the standard four-dimensional cosmology, in large extra dimensions absorption of matter from the primordial plasma by the black holes is significant and can lead to rapid growth of the black hole mass density. This effect can be used to constrain the conditions present in the very early universe. We demonstrate that this constraint is applicable in regions of parameter space not excluded by existing bounds.
  • An evaporating black hole in the presence of an extra spatial dimension would undergo an explosive phase of evaporation. We show that such an event, involving a primordial black hole, can produce a detectable, distinguishable electromagnetic pulse, signaling the existence of an extra dimension of size L{approx}10{sup -18}-10{sup -20} m. We derive a generic relationship between the Lorentz factor of a pulse-producing 'fireball' and the TeV energy scale. For an ordinary toroidally compactified extra dimension, transient radio-pulse searches probe the electroweak energy scale ({approx}0.1 TeV), enabling comparison with the Large Hadron Collider.
  • We solve Einstein equations on the brane to derive the exact form of the brane-world-corrected perturbations in Kerr-Newman singularities, using Randall-Sundrum and Arkani-Hamed-Dimopoulos-Dvali (ADD) models. It is a consequence of such models that Kerr-Newman mini-black holes can be produced in LHC. We use this approach to derive a normalized correction for the Schwarzschild Myers-Perry radius of a static (4+n)-dimensional mini-black hole, using more realistic approaches arising from Kerr-Newman mini-black hole analysis. Besides, we prove that there are four Kerr-Newman black hole horizons in the brane-world scenario we use, although only the outer horizon is relevant in the physical measurable processes.more » Parton cross sections in LHC and Hawking temperature are also investigated as functions of Planck mass (in the LHC range 1-10 TeV), mini-black hole mass, and the number of large extra dimensions in brane-world large extra-dimensional scenarios. In this case a more realistic brane-effect-corrected formalism can achieve more precisely the effective extra-dimensional Planck mass and the number of large extra dimensions--in the Arkani-Hamed-Dimopoulos-Dvali model--or the size of the warped extra dimension--in Randall-Sundrum formalism.« less
  • We explore the observability of extra dimensions through five-dimensional squashed Kaluza-Klein black holes residing in the Kaluza-Klein spacetime. With the expectation that the Hawking radiation reflects the five-dimensional nature of the squashed horizon, we study the Hawking radiation of a scalar field in the squashed black hole background. As a result, we show that the luminosity of Hawking radiation tells us the size of the extra dimension, namely, the squashed Kaluza-Klein black holes open a window to extra dimensions.
  • We have investigated the equations of geodesics for the black hole solution suggested in [1] in the Randall-Sundrum model with one brane. Being a generalization of the Schwarzschild metric, this solution has a structure like the Reissner-Nordstroem one, with the 'tidal charge' replacing the electric charge. Following our investigation of the behavior of geodesics, we have shown that this solution is consistent with observational data, without predicting the appearance of any fundamentally new effects. A more accurate constraint on the tidal charge is obtained by analyzing circular orbits.