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arXiv 2310.03079hep-phastro-ph.COgr-qchep-th
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双引力门暗物质

Bi-gravity Portal Dark Matter

Qing Chen, Shuang-Yong Zhou

AI总结:

本研究提出通过无鬼双引力门介导暗物质与标准模型相互作用的模型,其有质量自旋2媒介粒子可解决核尖问题,仍有参数空间可由XENONnT等实验检验,且预测了约10^6 GeV的再加热温度。

摘要:

我们研究了一种暗物质与标准模型粒子通过无鬼双引力门(bi-gravity portal)介导相互作用的模型。双引力模型引入了一种与通常的无质量引力子耦合的有质量自旋2粒子,以及通用的双度规物质耦合。我们计算了暗物质直接探测的截面,并将其与实验限制进行了比对。有质量自旋2媒介粒子的存在解决了核尖问题(core-cusp problem),这反过来又显著约束了这类双引力理论中的暗物质耦合。不过,仍存在一个参数空间窗口,可在即将开展的直接探测实验(如XENONnT和PandaX-30T)中对该模型进行检验。该模型还预测了约$10^6$ GeV量级的再加热温度。

英文摘要:

We consider a model where the interaction between dark matter and the Standard Model particles are mediated by a ghost-free bi-gravity portal. The bi-gravity model invokes a massive spin-2 particle coupled to the usual massless graviton as well as generic bi-metric matter couplings. The cross-sections for dark matter direct detection are computed and confronted with the experimental bounds. The presence of the massive spin-2 mediator resolves the core-cusp problem, which in turn significantly constrains the dark matter coupling in such a bi-gravity theory. Yet, there remains a window of the parameter space where the model can be tested in the upcoming direct detection experiments such as XENONnT and PandaX-30T. The model also predicts a reheating temperature of the order of $10^6$ GeV.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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