论文标题
现场重新定义，扰动单位性和希格斯通货膨胀
Field redefinitions, perturbative unitarity and Higgs inflation
论文作者
论文摘要
对于由Higgs场驱动的通货膨胀率与重力耦合，我们研究了扰动理论分解的截止能量量表。使用度量公式，我们首先概述已知结果，然后提供一种计算截止下界限的新方法。我们的方法既不依赖于量规选择，也不需要对振幅进行任何计算。取而代之的是，它利用了S-Matrix在字段重新定义下不变的事实。与以前的发现一致，我们证明，通货膨胀期间的截止值明显高于真空，这确保了半古典预测的稳健性。一路上，我们将发现概括为Palatini公式，并在两种情况下对Higgs Doublet的有用参数化发表评论。
For inflation driven by the Higgs field coupled non-minimally to gravity, we study the cutoff energy scale above which perturbation theory breaks down. Employing the metric formulation, we first give an overview of known results and then provide a new way to calculate a lower bound on the cutoff. Our approach neither relies on a gauge choice nor does it require any calculation of amplitudes. Instead, it exploits the fact that the S-matrix is invariant under field redefinitions. In agreement with previous findings, we demonstrate that the cutoff is significantly higher during inflation than in vacuum, which ensures the robustness of semi-classical predictions. Along the way, we generalize our findings to the Palatini formulation and comment on a useful parametrization of the Higgs doublet in both scenarios.
