We propose a non-oscillatory no-scale supergravity model of inflation (NO-NO inflation) in which the inflaton does not oscillate at the end of the inflationary era. Instead, the Universe is then dominated by the inflaton kinetic energy density (kination). During the transition from inflation to kination, the Universe preheats instantly through a coupling to Higgs-like fields. These rapidly annihilate and scatter into ultra-relativistic matter particles, which subsequently dominate the energy density, and reheating occurs at a temperature far above that of Big Bang Nucleosynthesis. After the electroweak transition, the inflaton enters a tracking phase as in some models of quintessential inflation. The model predictions for cosmic microwave background observables are consistent with Planck2018 data, and the density of gravitational waves is below the upper bound from Big Bang Nucleosynthesis. We also find that the density of supersymmetric cold dark matter produced by gravitino decay is consistent with Planck2018 data over the expected range of supersymmetric particle masses.

我们提出了一种非振荡无尺度超重力膨胀模型（NO-NO 膨胀），其中膨胀子在膨胀时代结束时不振荡。相反，宇宙然后由暴胀子动能密度（kination）主导。在从暴胀到扭结的过渡过程中，宇宙通过与类似希格斯场的耦合立即预热。它们迅速湮灭并散射成超相对论物质粒子，随后支配能量密度，并且在远高于大爆炸核合成的温度下发生重新加热。在电弱转变之后，暴胀子进入跟踪阶段，就像在某些典型暴胀模型中一样。宇宙微波背景观测模型预测与普朗克2018年数据一致，引力波的密度低于大爆炸核合成的上限。我们还发现，在超对称粒子质量的预期范围内，引力衰变产生的超对称冷暗物质的密度与 Planck2018 数据一致。