Revised Uncertainties in Big Bang Nucleosynthesis
Cosmology and Nongalactic Astrophysics
2017-09-20 v1
Abstract
Big Bang Nucleosynthesis (BBN) explores the first few minutes of nuclei formation after the Big Bang. We present updates that result in new constraints at the 2{\sigma} level for the abundances of the four primary light nuclides - D,3He,4He, and 7Li - in BBN. A modified standard BBN code was used in a Monte Carlo analysis of the nucleosynthesis uncertainty as a function of baryon-to-photon ratio. Reaction rates were updated to those of NACRE and REACLIB, and R-Matrix calculations. The results are then used to derive a new constraint on the effective number of neutrinos.
Cite
@article{arxiv.1706.02834,
title = {Revised Uncertainties in Big Bang Nucleosynthesis},
author = {Michael Foley and Nishanth Sasankan and Motohiko Kusakabe and Grant. J. Mathews},
journal= {arXiv preprint arXiv:1706.02834},
year = {2017}
}