Nonlinear Phenomena in Complex Systems, 2005, Vol.8, No.3, pp.308-312

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2005, Vol.8, No.3, pp.308-312

Primordial Black Hole Mass Growth in Braneworld Cosmologies.
V.V. Tikhomirov, Y.A. Tselkov

It is shown that collisions of particles of cosmological background should be taken into consideration to adequately describe accretion onto primordial black holes (PBHs) in braneworld cosmologies. When the particle collisions are really important, accretion of radiation dominated cosmological background is described by approximation of continuous matter which accretion rate, evaluated here for the first time, considerably exceeds the one obtained earlier in free particle approximation and gives footing to reconsider the possible observational consequences of extra dimensions. A new procedure of evaluation of intensive PBH accretion mass growth on the high-energy phase of Randall-Sundrum Type II braneworld cosmology is given.
Key words: black hole, braneworld cosmologies, accretion

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