A semi-analytical study of helium synthesis in brane cosmology

zbMATH Open1062.83569arXivastro-ph/0306051MaRDI QIDQ1888730

J. A. O. Marinho, J. C. Fabris

Publication date: 26 November 2004

Published in: Gravitation \& Cosmology (Search for Journal in Brave)

Abstract: The problem of primordial nucleosynthesis of helium in brane cosmology is studied using a semi-analytical method, where the Fermi-Dirac statistic is ignored. This semi-analytical method agrees with a more complete numerical calculation with a precision of order of 10% or better. The quadratic term for the matter density is the only source considered in the modified Einstein equations predicted by the brane configuration. This hypothesis is justified a posteriori. An agreement between theoretical and observational values for the helium abundance is obtained if the fundamental mass scale in five dimensions is of the order of $Msim5imes10^{3}GeV$.

Full work available at URL: https://arxiv.org/abs/astro-ph/0306051

Mathematics Subject Classification ID

Relativistic cosmology (83F05) Macroscopic interaction of the gravitational field with matter (hydrodynamics, etc.) (83C55)

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