标题： 从普朗克数据约束通胀有效场论的参数 显示英文标题

标题： Constraining parameters of effective field theory of inflation from Planck data

摘要： 宇宙微波背景可以提供有关早期宇宙物理的信息，更具体地说，是关于暴胀时期的物质-辐射分布的信息。 从暴胀的有效场论开始，我们利用Goldstone作用量计算了Goldstone场的三点关联函数，其结果可以直接应用于描述暴胀时期de Sitter解附近的曲率扰动场。 然后，我们使用Planck任务最近的数据来确定参数$f_{NL}^{equil}$和$f_{NL}^{orthog}$，这些参数表征了单场暴胀模型中产生的非高斯性的大小和形状。 利用这些已知值，我们计算了与我们的分析相关的参数$f_{NL}^{\dot{\pi}^3}$、$f_{NL}^{\dot{\pi}(\partial _i \pi)^2}$以及声速$c_s$，这些参数表征了标量场的两种不同广义相互作用产生的非高斯性。 显示英文摘要

摘要： The Cosmic Microwave Background can provide information regarding physics of the very early universe, more specifically, of the matter-radiation distribution of the inflationary era. Starting from the effective field theory of inflation, we use the Goldstone action to calculate the three point correlation function for the Goldstone field, whose results can be directly applied to the field describing the curvature perturbations around a de Sitter solution for the inflationary era. We then use the data from the recent Planck mission for the parameters $f_{NL}^{equil}$ and $f_{NL}^{orthog}$ which parametrize the size and shape of non-Gaussianities generated in single field models of inflation. Using these known values, we calculate the parameters relevant to our analysis, $f_{NL}^{\dot{\pi}^3}$, $f_{NL}^{\dot{\pi}(\partial _i \pi)^2}$ and the speed of sound $c_s$ which parametrize the non-Gaussianities arising from two different kinds of generalized interactions of the scalar field in question.