The gravitational interaction is ubiquitous and the effect of gravitational particle production necessarily contributes to the dark matter abundance. A simple candidate of dark matter is a scalar particle, whose only renormalizable interaction is the Higgs portal coupling. We show that the abundance of Higgs portal dark matter is significantly affected by the gravitational production effect. In particular, the gravitational production from the coherently oscillating inflaton field during the reheating often gives dominant contribution.

中文翻译：

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引力粒子产生对希格斯门暗物质的影响


引力相互作用无处不在，引力粒子产生的影响必然有助于暗物质的丰度。暗物质的一个简单候选者是标量粒子，其唯一可重整化的相互作用是希格斯门户耦合。我们表明，希格斯门暗物质的丰度受到引力产生效应的显着影响。特别是，再加热过程中相干振荡暴胀场产生的引力通常起着主导作用。