标题： 暗物质和轻子生成的共同起源在$U(1)_{B-L}$ 显示英文标题

标题： Common Origin of Dark Matter and Leptogenesis in $U(1)_{B-L}$

摘要： 在本文中，我们研究了暗物质和轻子生成在$U(1)_{B-L}$对称性下的共同参数空间。 该模型包含一个复标量$\phi$，惰性中微子$N$和马约拉纳暗物质$\chi$，其中只有暗物质$\chi$在$Z_2$对称性下带电。 $N$和$\chi$的质量通过与$\phi$的 Yukawa 相互作用在$U(1)_{B-L}$对称性破缺后生成。 TeV 能标惰性中微子$N$通过共振轻子生成机制负责重子不对称性的产生。 $U(1)_{B-L}$中的新粒子对$N$的稀释有显著影响，从而对轻子生成产生影响。 同时，暗物质$\chi$的湮灭过程几乎与$N$相同，这表明轻子生成和暗物质都与同时满足观测结果密切相关。 在各种理论和实验约束下，得到了暗物质和轻子生成的可行共同参数空间，适用于全局和局部$U(1)_{B-L}$对称性。 显示英文摘要

摘要： In this paper, we investigate the common parameter space of dark matter and leptogenesis in the $U(1)_{B-L}$ symmetry. This model involves a complex scalar $\phi$, sterile neutrinos $N$, and Majorana dark matter $\chi$, where only dark matter $\chi$ is charged under the $Z_2$ symmetry. Masses of $N$ and $\chi$ are generated via the Yukawa interactions to $\phi$ after breaking of the $U(1)_{B-L}$ symmetry. TeV scale sterile neutrinos $N$ are responsible for the generation of baryon asymmetry through the resonance leptogenesis mechanism. The new particles in the $U(1)_{B-L}$ have a significant impact on the dilution of $N$, thus on leptogenesis. Meanwhile, the annihilation processes of dark matter $\chi$ are almost identical to that of $N$, which indicates that both leptogenesis and dark matter are closely related to satisfying the observed results simultaneously. Under various theoretical and experimental constraints, the viable common parameter space of dark matter and leptogenesis is obtained for both global and local $U(1)_{B-L}$ symmetry.