Big Bang Nucleosynthesis Revisited via Trojan Horse Method Measurements
Abstract
Nuclear reaction rates are among the most important input for understanding primordial nucleosynthesis and, therefore, for a quantitative description of the early universe. An up-to-date compilation of direct cross-sections of 2H(d, p)3H, 2H(d, n)3He, 7Li(p, α)4He, and 3He(d, p)4He reactions is given. These are among the most uncertain cross-sections used and input for big bang nucleosynthesis calculations. Their measurements through the Trojan Horse method are also reviewed and compared with direct data. The reaction rates and the corresponding recommended errors in this work were used as input for primordial nucleosynthesis calculations to evaluate their impact on the 2H, 3, 4He, and 7Li primordial abundances, which are then compared with observations.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 2014
- DOI:
- 10.1088/0004-637X/786/2/112
- arXiv:
- arXiv:1403.4909
- Bibcode:
- 2014ApJ...786..112P
- Keywords:
-
- early universe;
- nuclear reactions;
- nucleosynthesis;
- abundances;
- primordial nucleosynthesis;
- Nuclear Experiment;
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- Nuclear Theory
- E-Print:
- 22 pages, 7 figures, accepted for publication in The Astrophysical Journal