论文标题
迅速转变多场通货膨胀的完全暗物质
Completely Dark Matter from Rapid-Turn Multifield Inflation
论文作者
论文摘要
我们研究了涉及两个标量场的通货膨胀模型的宇宙学重力颗粒产生。我们对仅在重力上相互作用并为暗物质提供候选的大量自旋0颗粒感兴趣。具体而言，我们研究了两个模型的快速转变多场膨胀模型，部分是由De Sitter Swampland猜想的部分动机，这些模型由场空间的曲率以及存在或不存在场空间“角动量”保护而区别。我们发现，其中一种模型导致颗粒的产生不足，无法解释观察到的暗物质遗物丰度。第二个模型能够通过重力产生来解释Spin-0暗物质的起源，我们确定了参数空间的相关区域，这些区域与深度遗物丰度的测量，深色 - 含量的同位物质扰动以及曲面相互作用的光谱相一致。我们的作品证明了De Sitter Swampland猜想与完全暗物质的兼容性。
We study cosmological gravitational particle production as applied to "rapid-turn" models of inflation involving two scalar fields. We are interested in the production of massive spin-0 particles that only interact gravitationally and provide a candidate for the dark matter. Specifically, we study two models of rapid-turn multifield inflation, motivated in part by the de Sitter swampland conjecture, that are distinguished by the curvature of field space and the presence or absence of field space 'angular momentum' conservation. We find that one of these models leads to insufficient particle production and cannot explain the observed dark matter relic abundance. The second model is able to explain the origin of spin-0 dark matter via gravitational production, and we identify the relevant region of parameter space that is consistent with measurements of the dark-matter relic abundance, the dark-matter-photon isocurvature perturbations, and the spectrum of curvature perturbations that is probed by cosmological observations. Our work demonstrates the compatibility of the de Sitter swampland conjecture with completely dark matter.
