Neutron injection during primordial nucleosynthesis alleviates the primordial 7Li problem

被引：11

作者：

Vasquez, Daniel Albornoz ^{[1
]}

Belikov, Alexander ^{[1
]}

Coc, Alain ^{[2
]}

Silk, Joseph ^{[1
,3
,4
]}

Vangioni, Elisabeth ^{[1
]}

机构：

[1] Univ Paris 06, Inst Astrophys Paris, CNRS, UMR 7095, F-75014 Paris, France

[2] Univ Paris 11, Ctr Spectrometrie Nucl & Spectrometrie Masse, CNRS, IN2P3,UMR 8609, F-91405 Orsay, France

[3] Univ Oxford, Beecroft Inst Particle Astrophys & Cosmol, Oxford OX1 3RH, England

[4] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

来源：

PHYSICAL REVIEW D | 2012年 / 86卷 / 06期

基金：

美国国家科学基金会;

关键词：

BIG-BANG NUCLEOSYNTHESIS; LITHIUM; ABUNDANCE; UNIVERSE;

D O I：

10.1103/PhysRevD.86.063501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a parametrized study of the effects of free thermal neutron injection on primordial nucleosynthesis, where both the rate and the time scale of injection are varied. This generic approach is found to yield a successful solution for reducing the Li-7 abundance without causing significant problems to other elemental abundances. Our analysis demonstrates that hadronic injection, possibly due to decays or annihilations of dark matter particles with a mass of about 1 to 30 GeV, provides a possible solution to an outstanding problem in the standard big bang model.

引用

页数：6

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