Revisiting big-bang nucleosynthesis constraints on dark-matter annihilation
Revisiting big-bang nucleosynthesis constraints on dark-matter annihilation
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DOI：
10.1016/j.physletb.2015.10.048
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发表时间：
2015-09
影响因子：
4.4
通讯作者：
M. Kawasaki;K. Kohri;T. Moroi;Y. Takaesu
中科院分区：
文献类型：
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作者：
M. Kawasaki;K. Kohri;T. Moroi;Y. Takaesu
我们研究了大爆炸核合成时期暗物质湮灭对轻元素原始丰度的影响。考虑了暗物质湮灭产生的反核子效应和高能核子非弹性散射时中子与质子的相互转换反应，改进了轻元素丰度的计算.比较最新的观测约束的原始轻元素丰度的理论预测，我们推导出暗物质对湮灭截面的上限。并讨论了对某些粒子物理模型的启示。
We study the effects of dark-matter annihilation during the epoch of big-bang nucleosynthesis on the primordial abundances of light elements. We improve the calculation of the light-element abundances by taking into account the effects of anti-nucleons emitted by the annihilation of dark matter and the interconversion reactions of neutron and proton at inelastic scatterings of energetic nucleons. Comparing the theoretical prediction of the primordial light-element abundances with the latest observational constraints, we derive upper bounds on the dark-matter pair-annihilation cross section. Implication to some of particle-physics models are also discussed.