高曲率修正和张量模
Higher-Curvature Corrections and Tensor Modes
摘要：
如果暴胀能量尺度足够高，对有效引力作用量的更高曲率修正可能会在原始张量扰动谱中留下特征。在本文中，我们进一步研究的影响，耦合的Inflaton场的高曲率张量的模型与最小破缺的共形对称性。我们表明，一个可观察到的违反张量的一致性关系，从较高的曲率张量也意味着一个相对较大的运行张量倾斜，甚至增强了一些数量级的标准慢滚的情况下。这可能会在张量两点函数中留下签名，我们可以测试这些签名以识别更高曲率的效应，尤其是如果它们被转化为未来引力波实验可见的蓝色倾斜光谱。利用当前的宇宙微波背景和引力波的数据，我们还得到了对暴胀参数的约束，推断大的高曲率修正似乎是不利的。
英文摘要：
Higher-curvature corrections to the effective gravitational action may leave signatures in the spectrum of primordial tensor perturbations if the inflationary energy scale is sufficiently high. In this paper we further investigate the effects of a coupling of the Inflaton field to higher-curvature tensors in models with a minimal breaking of conformal symmetry. We show that an observable violation of the tensor consistency relation from higher-curvature tensors implies also a relatively large running of the tensor tilt, enhanced even by some order of magnitude with respect to the standard slow roll case. This may leave signatures in the tensor two-point function that we could test to recognize higher-curvature effects, above all if they are translated into a blue tilted spectrum visible by future Gravitational Wave experiments. Exploiting current cosmic microwave background and gravitational wave data we also derive constraints on the inflationary parameters, inferring that large higher-curvature corrections seem to be disfavored.
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