论文标题
通用U $（1）_x $模型中的伪标量暗物质
Pseudo scalar dark matter in a generic U$(1)_X$ model
论文作者
论文摘要
我们考虑了标准模型〜（SM）的$ u（1）_x $扩展，其中$ u（1）_x $量规组的自发断裂会导致伪标量粒子，这是暗物质的拟议候选者。在模型中，我们介绍了三个右撇子中微子〜（rhns）$ n_r^i $和两个额外的标量$φ$，$χ$，它们是SM量规单程，但在$ u（1）_x $ gauge组下收取。右撇子中微子必须使模型无异常并解释中微子振荡数据。最重的标量打破了$ u（1）_x $量规对称性，而另一个额外的标量会提供伪标量的DM候选者。伪标量暗物质〜（DM）是一个有趣的候选者，因为它自然会由于其耦合结构而自然逃避严格的直接检测边界。我们在考虑几个理论和实验性约束的同时，研究了该伪量表DM的现象学。我们发现，在我们的模型中，有一个可行的参数空间，它可以通过DM寿命界限，遗物和直接检测约束来满足，同时尊重围栏和其他边界。
We consider a $U(1)_X$ extension of the Standard Model~(SM), where the spontaneous breaking of $U(1)_X$ gauge group results in a pseudo scalar particle which is the proposed candidate for dark matter. In the model, we introduce three right-handed neutrinos~(RHNs) $N_R^i$ and two extra scalars $Φ$, $χ$, which are SM gauge singlets but charged under $U(1)_X$ gauge group. Right-handed neutrinos are required to have the model anomaly free and explain the neutrino oscillation data. The heaviest scalar breaks the $U(1)_X$ gauge symmetry and the other extra scalar gives a pseudo scalar DM candidate. A pseudo scalar dark matter~(DM) is an interesting candidate as it naturally evades the stringent direct detection bounds due to its coupling structure. We study the phenomenology of this pseudo-scalar DM while considering several theoretical and experimental constraints. We find that in our model, there is a feasible parameter space, which satisfies by the DM lifetime bound, relic and direct detection constraints while respecting the colliders and other bounds.
