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arXiv 2203.02004hep-phastro-ph.COhep-th
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具有非最小耦合的引力门户

Gravitational Portals with Non-Minimal Couplings

Simon Clery, Yann Mambrini, Keith A. Olive, Andrey Shkerin, Sarunas Verner

摘要:

我们考虑非最小耦合的影响,曲率的形式$ξ_S S^2 R$,三种类型的标量:希格斯玻色子,暴胀子,和标量暗物质候选人。我们计算这些非最小耦合引力产生的暗物质的丰度,并与最小耦合的类似结果进行比较。我们还计算了在再加热过程中对辐射浴的贡献。主要影响是在再加热期间最高温度的潜在增加。得到了一个与模型无关的极限为$\mathcal{O}(10^{12})$ GeV。对于耦合$ξ_S \gtrsim \mathcal{O}(1)$,这些在最小引力相互作用上占主导地位。

英文摘要:

We consider the effects of non-minimal couplings to curvature of the form $ξ_S S^2 R$, for three types of scalars: the Higgs boson, the inflaton, and a scalar dark matter candidate. We compute the abundance of dark matter produced by these non-minimal couplings to gravity and compare to similar results with minimal couplings. We also compute the contribution to the radiation bath during reheating. The main effect is a potential augmentation of the maximum temperature during reheating. A model independent limit of $\mathcal{O}(10^{12})$ GeV is obtained. For couplings $ξ_S \gtrsim \mathcal{O}(1)$, these dominate over minimal gravitational interactions.

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