Big-bang nucleosynthesis with a long-lived charged massive particle including 4He spallation processes
Big-bang nucleosynthesis with a long-lived charged massive particle including 4He spallation processes
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DOI：
10.1103/physrevd.84.035008
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发表时间：
2011-08-09
影响因子：
5
通讯作者：
Yazaki, Koichi
中科院分区：
文献类型：
--
作者：
Jittoh, Toshifumi;Kohri, Kazunori;Yazaki, Koichi
在超对称标准模型中，我们提出了由长寿命的Stau引起的氦-4辐射过程，并研究了该过程对轻元素丰度的影响。我们表明，只要氦-4的自旋过程的相空间是开放的，它们比stau催化聚变更重要，因此限制了stau属性。
We propose helium-4 spallation processes induced by long-lived stau in supersymmetric standard models, and investigate an impact of the processes on light elements abundances. We show that, as long as the phase space of helium-4 spallation processes is open, they are more important than stau-catalyzed fusion and hence constrain the stau property.