An analysis of helium primordial nucleosynthesis with a variable cosmological coupling
General Relativity and Quantum Cosmology
2015-06-25 v1 Astrophysics
Abstract
The synthesis of helium in the early Universe depends on many input parameters, including the value of the gravitational coupling during the period when the nucleosynthesis takes place. We compute the primordial abundance of helium as function of the gravitational coupling, using a semi-analytical method, in order to track the influence of in the primordial nucleosynthesis. To be specific, we construct a cosmological model with varying , using the Brans-Dicke theory. The greater the value of at nucleosynthesis period, the greater the abundance of helium predicted. Using the observational data for the abundance of the primordial helium, constraints for the time variation of are established.
Cite
@article{arxiv.gr-qc/0105062,
title = {An analysis of helium primordial nucleosynthesis with a variable cosmological coupling},
author = {F. G. Alvarenga and J. C. Fabris and S. V. B. Goncalves and J. A. O. Marinho},
journal= {arXiv preprint arXiv:gr-qc/0105062},
year = {2015}
}
Comments
Latex file, 10 pages