论文标题
混合度量 - 帕拉蒂尼希格斯通货膨胀
Hybrid metric-Palatini Higgs inflation
论文作者
论文摘要
我们提出了将希格斯通货膨胀扩展到杂化公制的重力，在那里我们引入了希格斯之间的非最小耦合以及公制型和palatini-type ricci stalcars。我们研究了模型的通货膨胀现象学，并发现可以在大型野外制度中实现缓慢的通胀，从而给出了观察方面的预测。特别是，标量光谱指数表现出吸引人的行为，以$ n _ {\ mathrm {s}} \ sim 0.964 $表现出来，而张量表与刻录比可以根据非微型耦合参数（带有指标higgs limit lim lim lim the the Metric-higgs lim lim lim lim r r \ r \ sim sim10^sim10^$ sim 10} $ 3} $ 3}的张量比比率可以占据任意价值。我们还研究了模型的单位性属性。由于该模型的紫外线（紫外线）截止值是该模型的低能量有效田间理论（EFT），这显着低于普朗克量表，这是由于田间空间的强曲率，因此我们考虑使用额外的标量场候选紫外线扩展理论的候选者，从而引入了额外的标量场，以使五降高的田间空间变平。尽管田间空间可以完全平坦，并且这种方法可以导致弱耦合的EFT，但我们会暗示Planck-Scale EFT只能在公制式通货膨胀的极限中实现。我们还讨论了该模型的概括至质量差异四。
We propose an extension of the Higgs inflation to the hybrid metric-Palatini gravity, where we introduce non-minimal couplings between Higgs and both the metric-type and the Palatini-type Ricci scalars. We study the inflationary phenomenology of our model and find that slow-roll inflation can be realized in the large-field regime, giving the observationally favored predictions. In particular, the scalar spectral index exhibits an attractor behavior to $n_{\mathrm{s}}\sim 0.964$, while the tensor-to-scalar ratio can take an arbitrary value depending on the non-minimal coupling parameters, with the metric-Higgs limit $r\sim10^{-3}$ being the maximum. We also investigate the unitarity property of our model. As the ultraviolet (UV) cutoff as a low-energy effective field theory (EFT) of this model is significantly lower than the Planck scale due to a strong curvature of field-space, we consider a possible candidate of UV-extended theories with an additional scalar field introduced so as to flatten the field-space in five-dimension. While the field-space can be flatten completely and this approach can lead to a weakly-coupled EFT, we gain an implication that Planck-scale EFT can be only realized in the limit of metric-Higgs inflation. We also discuss generalizations of the model up to mass-dimension four.
