论文标题
在深色物质模型中的中子星加热$ g-2 $差异
Neutron Star Heating in Dark Matter Models for the Muon $g-2$ Discrepancy
论文作者
论文摘要
可以在与Muons结合的弱相互交互的巨大颗粒（WIMP）的模型中解释，可以在偏离标准模型预测的MUON磁性偶极矩的观察值。但是，在将来的LHC实验和暗物质（DM）直接搜索中，此类模型的参数空间相当多。在这项工作中，我们讨论了中子星（NSS）的温度观察，这是一种有希望的探测此类模型的方法，因为NSS通过DM-MUON有效地捕获了WIMP，或者通过DM-MUON或依赖性依赖性的DM核苷散射捕获。被捕获的wimps最终在恒星芯中歼灭并加热NS。在旧的NSS中可以观察到这种效果，因为它最多可以将NS表面温度保持在几千K处，这比NSS的标准NS冷却理论的预测值高得多，而NSS的NSS年龄大于$ \ sim 10^7美元。我们考虑两类的代表性模型，其中DM夫妇或不在树级上夫妇将Higgs字段搭配到Higgs字段，并证明在两种情况下都实现了最大的DM加热。
The observed value of the muon magnetic dipole moment, which deviates from the Standard Model prediction by $4.2σ$, can be explained in models with weakly-interacting massive particles (WIMPs) coupled to muons. However, a considerable range of parameter space of such models will remain unexplored in the future LHC experiments and dark matter (DM) direct searches. In this work we discuss the temperature observation of neutron stars (NSs) as a promising way to probe such models given that WIMPs are efficiently captured by NSs through DM-muon or spin-dependent DM-nucleon scattering. The captured WIMPs eventually annihilate in the star core and heat the NS. This effect can be observed in old NSs as it keeps the NS surface temperature at a few thousand K at most, which is much higher than the predicted values of the standard NS cooling theory for NSs older than $\sim 10^7$ years. We consider two classes of representative models, where the DM couples or does not couple to the Higgs field at tree level, and show that the maximal DM heating is realized in both scenarios.
