论文标题
通过重力门户对暗物质腐烂的观察性约束
Observational constraints on dark matter decaying via gravity portals
论文作者
论文摘要
全局对称性可以保证暗物质颗粒的稳定性（DMP）。但是，暗物质（DM）和重力之间的非微小耦合会破坏DMP的全球对称性，从而导致其衰变。在标量单线暗物质（SSDM）和重力之间非微小耦合的框架下，值得探索SSDM的对称性在多大程度上被打破。建议SSDM的衰减产物的总量不能超过当前的观察限制。沿着这些线路，使用卫星（例如费米 - 拉特和AMS-02）获得的数据可以限制SSDM全局对称性破坏的强度。由于许多良好动机的DM候选物的质量可能在GEV范围内，因此我们确定了该范围内寿命的合理参数范围。我们发现，当SSDM的质量围绕Electroweak量表（246 GEV）时，SSDM寿命的相应3- $σ$下限为$ 5.3 \ times10^{26} $ s。我们对典型电动量表周围SSDM的分析包含所有质量范围中最丰富的衰减通道，因此在重力影响下对SSDM行为的分析更为全面。
Global symmetry can guarantee the stability of dark matter particles (DMps). However, the nonminimal coupling between dark matter (DM) and gravity can destroy the global symmetry of DMps, which in turn leads to their decay. Under the framework of nonminimal coupling between scalar singlet dark matter (ssDM) and gravity, it is worth exploring to what extent the symmetry of ssDM is broken. It is suggested that the total amount of decay products of ssDM cannot exceed current observational constraints. Along these lines, the data obtained with satellites such as Fermi-LAT and AMS-02 can limit the strength of the global symmetry breaking of ssDM. Since the mass of many well--motivated DM candidates may be in the GeV--TeV range, we determine a reasonable parameter range for the lifetime in this range. We find that when the mass of the ssDM is around the electroweak scale (246 GeV), the corresponding 3--$σ$ lower limits of the lifetime of ssDM is $5.3\times10^{26}$ s. Our analysis of ssDM around the typical electroweak scale contains the most abundant decay channels of all mass range, so the analysis of the behaviour of ssDM under the influence of gravity is more comprehensive.
