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arXiv 0709.1632hep-ph
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II型跷跷板模型中作为暖暗物质的不育中微子

Sterile Neutrinos as the Warm Dark Matter in the Type II Seesaw Model

Wan-lei Guo

摘要:

在第二类跷跷板机制的框架下,我们讨论了作为暖暗物质(WDM)的无菌右手Majorana中微子的数量。当II型跷跷板质量项$M_ν^{II}$远小于I型跷跷板质量项$M_ν^{I}$时,三个不育中微子中只有一个可能是WDM粒子。相反,WDM粒子可能包含所有的不育中微子。如果是$M_ν^{II} \sim M_ν^{I}$,对于$N$无菌中微子,允许的数目不超过$N - 1$。值得强调的是,当$M_ν^{II} \gg M_ν^{I}$和$M_ν^{II} \sim M_ν^{I}$被使用时,允许有三种不同类型的中微子质谱。

英文摘要:

In the framework of type II seesaw mechanism we discuss the number of sterile right-handed Majorana neutrinos being the warm dark matter (WDM). When the type II seesaw mass term $M_ν^{II}$ is far less than the type I seesaw mass term $M_ν^{I}$, only one of three sterile neutrinos may be the WDM particle. On the contrary, the WDM particles may contain all sterile neutrinos. If $M_ν^{II} \sim M_ν^{I}$, the allowed number is not more than $N - 1$ for $N$ sterile neutrinos. It is worthwhile to stress that three different types of neutrino mass spectrum are permitted when $M_ν^{II} \gg M_ν^{I}$ and $M_ν^{II} \sim M_ν^{I}$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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