Primordial nucleosynthesis

被引：61

作者：

Coc, Alain ^{[1
]}

Vangioni, Elisabeth ^{[2
,3
]}

机构：

[1] Univ Paris Saclay, CSNSM, CNRS, IN2P3,Univ Paris Sud, Batiment 104,Orsay Campus, F-91405 Orsay, France

[2] Univ Paris 06, Inst Astrophys Paris, CNRS, UMR 7095, 98 Bis Bd Arago, F-75014 Paris, France

[3] Sorbonne Univ, Inst Lagrange Paris, 98 Bis Bd Arago, F-75014 Paris, France

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS E | 2017年 / 26卷 / 08期

关键词：

Big bang nucleosynthesis; nuclear reactions; cosmology; DEUTERIUM ABUNDANCE; LITHIUM; STARS; PHYSICS;

D O I：

10.1142/S0218301317410026

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Primordial nucleosynthesis, or big bang nucleosynthesis (BBN), is one of the three evidences for the big bang model, together with the expansion of the universe and the cosmic microwave background. There is a good global agreement over a range of nine orders of magnitude between abundances of He-4, D, He-3 and Li-7 deduced from observations, and calculated in primordial nucleosynthesis. However, there remains a yet-unexplained discrepancy of a factor approximate to 3, between the calculated and observed lithium primordial abundances, that has not been reduced, neither by recent nuclear physics experiments, nor by new observations. The precision in deuterium observations in cosmological clouds has recently improved dramatically, so that nuclear cross-sections involved in deuterium BBN needs to be known with similar precision. We will briefly discuss nuclear aspects related to the BBN of Li and D, BBN with nonstandard neutron sources, and finally, improved sensitivity studies using a Monte Carlo method that can be used in other sites of nucleosynthesis.

引用

页数：20