论文标题
Light $ z^\ prime $和u（1）$ _ x $ gauge对称性的暗物质
Light $Z^\prime$ and Dark Matter from U(1)$_X$ Gauge Symmetry
论文作者
论文摘要
我们考虑使用$ z^\ prime $ - prime $ - portal majorana fermion暗物质的标准模型（SM）的u（1）$ _ x $量规对称扩展，该暗物质允许相对较轻的玻色子$ z^\ prime $，质量为10 mev $ - 质量为10 mev $ - $ $ $ $ - 几个GEV，并且通过免费的内部机构进行了较高的gev和较重的深色物质。在第二种情况下，角色被逆转，在KEV范围左右的暗物质质量位于$ z^\ prime $质量以下，例如$ \ sim 1 $ gev。我们概述了可以在未来的终生前沿实验中探索这两种情况的参数空间，包括Belle-II，Faser，LDMX和Ship。
We consider a U(1)$_X$ gauge symmetry extension of the Standard Model (SM) with a $Z^\prime$-portal Majorana fermion dark matter that allows for a relatively light gauge boson $Z^\prime$ with mass of 10 MeV$-$ a few GeV and a much heavier dark matter through the freeze-in mechanism. In a second scenario the roles are reversed, and the dark matter mass, in the keV range or so, lies well below the $Z^\prime$ mass, say, $\sim 1$ GeV. We outline the parameter space that can be explored for these two scenarios at the future Lifetime Frontier experiments including Belle-II, FASER, LDMX and SHiP.
