Refined big bang nucleosynthesis constraints on Ω_{B} and N_{ν}
Abstract
We include corelations between elemental abundances in a Monte Carlo statistical analysis of big bang nucleosynthesis (BBN) predictions, which, along with updated reaction rates and an improved BBN code, lead to tightened constraints on Ω_{B} and N_{ν}. Observational upper limits on the respective primordial ^{4}He and D+^{3}He fractions of 24% (by mass) and 10^{4} lead to the limits 0.0097h^{2}<=Ω_{B}<=0.011h^{2} and N_{ν}<=3.04. The former argues against purely baryonic galactic halo dark matter, while the latter could put qualitatively new constraints on neutrinos and new physics. Systematic uncertainties in the inferred primordial abundances of ^{4}He and D+^{3}He are required to relax these constraints.
 Publication:

Physical Review Letters
 Pub Date:
 May 1994
 DOI:
 10.1103/PhysRevLett.72.3309
 arXiv:
 arXiv:astroph/9402010
 Bibcode:
 1994PhRvL..72.3309K
 Keywords:

 98.80.Ft;
 98.80.Cq;
 Origin formation and abundances of the elements;
 Particletheory and fieldtheory models of the early Universe;
 Astrophysics;
 High Energy Physics  Phenomenology;
 Nuclear Theory
 EPrint:
 13 pages, latex, 3 uuencoded figures (appended)