论文标题
引力重新加热和超量偶联后的通货膨胀后产生超重的暗物质
Gravitational reheating and superheavy Dark Matter creation after inflation with non-minimal coupling
论文作者
论文摘要
我们在通货膨胀方案中讨论了超重颗粒的重力创造$χ$，具有四分之一的潜力和Aftraton $φ$与RICCI曲率之间的非最小耦合：$ξφ^2 r/2 $。我们表明，对于大型常数$ξ>> 1 $，可以大量的颗粒产生$χ$，群众在很大程度上超过了通货膨胀的哈勃速率$ h_ {liff} $，即使它们是符合性耦合的，也可以超过$ h_ {firm $ h_ {fimp $ h_ {firm $ h_ {firm h_ {aff} $。我们讨论涉及这些重力产生的颗粒$χ$的两个情况。在第一种情况下，充气仅与物质部门和颗粒$χ$重新加热宇宙的引力相互作用。在这张照片中，充气量仅由于宇宙膨胀而衰减，并有效地有助于暗辐射，这可以观察到可观察到的大小。黑暗辐射的现有限制导致上限在加热温度上。在第二种情况下，如果基本稳定，粒子$χ$构成暗物质。在这种情况下，他们的典型群众应该在大统一量表的球场上。
We discuss the gravitational creation of superheavy particles $χ$ in an inflationary scenario with a quartic potential and a non-minimal coupling between the inflaton $φ$ and the Ricci curvature: $ξφ^2 R/2$. We show that for large constants $ξ>> 1$, there can be abundant production of particles $χ$ with masses largely exceeding the inflationary Hubble rate $H_{infl}$, up to $(a~few) \times ξH_{infl}$, even if they are conformally coupled to gravity. We discuss two scenarios involving these gravitationally produced particles $χ$. In the first scenario, the inflaton has only gravitational interactions with the matter sector and the particles $χ$ reheat the Universe. In this picture, the inflaton decays only due to the cosmic expansion, and effectively contributes to dark radiation, which can be of the observable size. The existing limits on dark radiation lead to an upper bound on the reheating temperature. In the second scenario, the particles $χ$ constitute Dark Matter, if substantially stable. In this case, their typical masses should be in the ballpark of the Grand Unification scale.
