论文标题
跨越两个组件的暗物质模型以及对511 keV $γ$ ray和Xenon1t的影响
Crossing two-component dark matter models and implications for 511 keV $γ$-ray and XENON1T excesses
论文作者
论文摘要
我们使用$ u（1）_x $深色量规对称性研究标量和费米子交叉两组式暗物质（C2CDM）模型。这个$ u（1）_x $量规对称是通过黑暗希格斯田$φ$的深色希格斯机制损坏的，深色光子变得巨大。另一方面，相同的深色希格斯字段$φ$也充当两个DM扇区的每个组件之间的桥梁，从而诱发了它们之间的黑暗变化中性电流（DFCNC）相互作用。此外，这两个DM扇区之间的质量分裂是在$ u（1）_x $ $量表对称性折断后生成的，nonzero $ \langleφ\ rangle $。我们讨论了DM候选物的稳定性，并允许C2CDM模型中的遗物密度和其他约束的参数空间。研究了一些在Belle II的新型签名。最后，讨论了C2CDM模型中511 KEV $γ$ ray线和Xenon1t过量的可能解释。
We study scalar and fermionic crossing two-component dark matter (C2CDM) models with $ U(1)_X $ dark gauge symmetry. This $ U(1)_X $ gauge symmetry is broken via the dark Higgs mechanism of a dark Higgs field $Φ$ and the dark photon becomes massive. On the other hand, the same dark Higgs field $Φ$ also serves as a bridge between each component of two DM sectors such that the dark flavor-changing neutral current (DFCNC) interaction between them is induced. Moreover, the mass splitting between these two DM sectors is generated after $ U(1)_X $ gauge symmetry breaking by nonzero $\langle Φ\rangle$. We discuss the stability of DM candidates and allowed parameter space from the relic density and other constraints in C2CDM models. Some novel signatures with displaced vertices at Belle II are studied. Finally, the possible explanations of 511 keV $γ$-ray line and XENON1T excess in C2CDM models are discussed.
