Momentum dependence of the bispectrum in two-field inflation
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(2013)
摘要
We examine the momentum dependence of the bispectrum of two-field inflationary models within the long-wavelength formalism. We determine the sources of scale dependence in the expression for the parameter of non-Gaussianity f(NL) and study two types of variation of the momentum triangle: changing its size and changing its shape. We introduce two spectral indices that quantify the possible types of momentum dependence of the local type f(NL) and illustrate our results with examples.
更多查看译文
关键词
inflation,non-gaussianity,cosmological perturbation theory
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要