In scalaron-Higgs inflation the Standard Model Higgs boson is non-minimally coupled to gravity and the Einstein-Hilbert action is supplemented by the quadratic scalar curvature invariant. For the quartic Higgs self-coupling λ fixed at the electroweak scale, we find that the resulting inflationary two-field model effectively reduces to a single field model with the same predictions as in Higgs inflation or Starobinsky inflation, including the limit of a vanishing non-minimal coupling. For the same model, but with the scalar field a priori not identified with the Standard Model Higgs boson, we study the inflationary consequences of an extremely small λ. Depending on the initial conditions for the inflationary background trajectories, we find that the two-field dynamics either again reduces to an effective single-field model with a larger tensor-to-scalar ratio than predicted in Higgs inflation and Starobinsky inflation, or involves the full two-field dynamics and leads to oscillatory features in the inflationary power spectrum. Finally, we investigate under which conditions the inflationary scenario with extremely small λ can be realized dynamically by the Standard Model renormalization group flow and discuss how the scalaron-Higgs model can provide a natural way to stabilize the electroweak vacuum.

在标量-希格斯膨胀中，标准模型希格斯玻色子与引力非最小耦合，并且二次标量曲率不变性补充了爱因斯坦-希尔伯特作用。对于固定在电弱尺度上的四次希格斯自耦合λ，我们发现所得的通货膨胀两场模型可以有效地简化为单场模型，其预测与希格斯通货膨胀或Starobinsky通货膨胀相同，包括消失的极限。 -最小耦合。对于相同的模型，但标量场没有使用希格斯玻色子标准模型确定的先验，我们研究了极小λ的通货膨胀后果。根据通货膨胀本底轨迹的初始条件，我们发现两场动力学或者再次简化为有效的单场模型，其张量与标量之比比希格斯通货膨胀和斯塔罗宾斯基通货膨胀的预测要大，或者涉及充分的两场动力学特性，并导致通货膨胀功率谱出现振荡特征。最后，我们研究了在哪种条件下可以通过标准模型重归一化群流动态实现具有极小λ的膨胀情况，并讨论了scalaron-Higgs模型如何提供稳定电弱真空的自然方法。