论文标题
$ z_5 $两组式暗物质的型号
The $Z_5$ model of two-component dark matter
论文作者
论文摘要
基于单个$ z_n $（$ n \ geq 4 $）对称性的多组分标量暗物质的方案是简单且动机的。在本文中，我们首次研究了$ Z_5 $模型的两个组件暗物质的现象学。该模型可以看作是众所周知的单元标量模型的扩展，具有两个复杂的标量字段 - 暗物质粒子 - 是标准模型单元，但在$ Z_5 $对称下的电荷不同。 $ z_5 $允许的相互作用引起了影响其遗物密度和检测前景的暗物质颗粒之间的新过程，我们将详细研究。确定了模型的关键参数，其可行区域的特征是通过随机扫描的方式来表征。我们表明，与Singlet标量模型不同，TEV下方的暗物质质量仍然与当前数据兼容。即使事实证明暗物质密度由较轻的组件主导，我们发现当前和将来的直接检测实验可能对两个暗物质颗粒的信号敏感。
Scenarios for multi-component scalar dark matter based on a single $Z_N$ ($N\geq 4$) symmetry are simple and well-motivated. In this paper we investigate, for the first time, the phenomenology of the $Z_5$ model for two-component dark matter. This model, which can be seen as an extension of the well-known singlet scalar model, features two complex scalar fields--the dark matter particles--that are Standard Model singlets but have different charges under a $Z_5$ symmetry. The interactions allowed by the $Z_5$ give rise to novel processes between the dark matter particles that affect their relic densities and their detection prospects, which we study in detail. The key parameters of the model are identified and its viable regions are characterized by means of random scans. We show that, unlike the singlet scalar model, dark matter masses below the TeV are still compatible with present data. Even though the dark matter density turns out to be dominated by the lighter component, we find that current and future direct detection experiments may be sensitive to signals from both dark matter particles.
