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Microscopic primordial black holes and extra dimensions
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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.
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Cited by 2 Pith papers
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Approximate Symmetries and Gravity
The authors propose a 'Swampland Symmetry Conjecture' requiring local symmetry-violating operators to act faster than thermal black holes, and show that the Weak Gravity Conjecture typically enforces this bound in gau...
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Micro Black Hole Dark Matter
Micro black holes could survive as dark matter down to 10^{-5} Planck masses if extra dimensions or many species strengthen the memory-burden suppression of their evaporation.
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