D'Amico Guido, Kleban Matthew
Center for Cosmology and Particle Physics, New York University, New York, New York 10003, USA.
Phys Rev Lett. 2014 Aug 22;113(8):081301. doi: 10.1103/PhysRevLett.113.081301. Epub 2014 Aug 20.
We analyze primordial non-Gaussianity in single-field inflationary models when the tensor-to-scalar ratio is large. Our results show that detectable levels of non-Gaussianity f(NL) ∼ 50 are still possible in the simplest class of models described by the effective theory of inflation. However, the shape is very tightly constrained, making a sharp prediction that could be confirmed or falsified by a future detection of non-Gaussianity.
我们分析了张量与标量比很大时单场暴胀模型中的原初非高斯性。我们的结果表明，在由暴胀有效理论描述的最简单模型类别中，仍有可能出现可探测水平的非高斯性f(NL) ∼ 50。然而，其形状受到非常严格的限制，做出了一个尖锐的预测，未来对非高斯性的探测可能会证实或证伪这一预测。
