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arXiv 1901.06910hep-ph
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扩展BLMSSM中暗物质的研究

Study of dark matter in the extended BLMSSM

Jing-Jing Feng, Shu-Min Zhao, Xing-Xing Dong, Zhong-Jun Yang, Hai-Bin Zhang, Fang Wang, Tai-Fu Feng

摘要:

目前在一些实验中已经有了暗物质存在的有力证据。然而,问题是,在粒子物理学的标准模型(SM)框架下,我们对暗物质没有一个合理的解释。为了解释暗物质,有必要对SM进行扩展。根据目前暗物质可能存在的条件,我们选择$χ^0_L$和$\tilde{Y}$作为EBLMSSM中暗物质的候选者。我们详细研究了主要的湮灭过程,包括$\barχ^0_Lχ^0_L(\bar{\tilde{Y}}\tilde{Y})\rightarrow \bar{l}^Il^I$和$\barχ^0_Lχ^0_L(\bar{\tilde{Y}}\tilde{Y})\rightarrow \barν^Iν^I$。计算了它们的湮没截面$σ$和残余密度$Ω_D h^2$。然后分析了暗物质遗迹密度对EBLMSSM参数的限制。

英文摘要:

There are strong evidences for existence of dark matter in some experiments at present. However, the question is that we do not have a reasonable explanation for dark matter in the framework of the Standard Model(SM) of particle physics. It is necessary to extend the SM in order to explain the dark matter. According to the current possible existence conditions of dark matter, we choose $χ^0_L$ and $\tilde{Y}$ as candidates for dark matter in the EBLMSSM. We study the dominant annihilation processes in detail, including $\barχ^0_Lχ^0_L(\bar{\tilde{Y}}\tilde{Y})\rightarrow \bar{l}^Il^I$ and $\barχ^0_Lχ^0_L(\bar{\tilde{Y}}\tilde{Y})\rightarrow \barν^Iν^I$. And we calculate their annihilation cross section $σ$ and relic density $Ω_D h^2$. Then we analyze the limitations of dark matter relic density on the parameters of the EBLMSSM.

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