Big bang nucleosynthesis constraints on bulk neutrinos

Details Big bang nucleosynthesis constraints on bulk neutrinos Big bang nucleosynthesis constraints on bulk neutrinos

2001-10-11

arxiv.org/abs/hep-ph/0110161v3

Phys.Rev. D65 (2002) 085018

Physics

High Energy Physics

High Energy Physics - Phenomenology

Minor changes in text; final results unchanged; a shortened version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.65.085018

We examine the constraints imposed by the requirement of successful big bang nucleosynthesis on models with one large extra dimension and a single bulk neutrino. We solve the Boltzman kinetic equations for the thermal distribution of bulk neutrino modes and evaluate their contribution to the energy density of the universe at the BBN epoch. This helps us to constrain the size of the extra dimensions and the mixing parameter between the active and bulk neutrinos.

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