H-dibaryons and Primordial Nucleosynthesis
Astrophysics
2009-10-31 v1
Abstract
The apparent discrepancy between abundances of light nuclides predicted by the standard Big-Bang and observational data is explained, by assuming the presence of metastable H dibaryons at the nucleosynthesis era. These dibaryons could be formed out of a small fraction of strange quarks at the moment of the confinement transition. For a primordial deuterium abundance of the order of 3 10^{-5}, the measured differences in the 4He abundances requires a relative abundance of H dibaryons of the order of n_H/n_B = 0.07, decaying in a timescale of the order of 10^5 s.
Cite
@article{arxiv.astro-ph/9810283,
title = {H-dibaryons and Primordial Nucleosynthesis},
author = {J. A. de Freitas Pacheco and S. Stoica and F. Thevenin and J. E. Horvath},
journal= {arXiv preprint arXiv:astro-ph/9810283},
year = {2009}
}
Comments
Latex, 5 pages, to appear in PRD