Title: Scale-dependence of Non-Gaussianity in the Curvaton Model Show Chinese title

Title: 曲率子模型中非高斯性的尺度依赖性

Abstract: We investigate the scale-dependence of f_NL in the self-interacting curvaton model. We show that the scale-dependence, encoded in the spectral index n_{f_NL}, can be observable by future cosmic microwave background observations, such as CMBpol, in a significant part of the parameter space of the model. We point out that together with information about the trispectrum g_NL, the self-interacting curvaton model parameters could be completely fixed by observations. We also discuss the scale-dependence of g_NL and its implications for the curvaton model, arguing that it could provide a complementary probe in cases where the theoretical value of n_{f_NL} is below observational sensitivity. Show Chinese abstract

Abstract: 我们研究了自相互作用波动子模型中f_NL的尺度依赖性。 我们表明，尺度依赖性以谱指数n_{非线性函数}的形式编码，可以通过未来的宇宙微波背景观测（如CMBpol）在模型参数空间的很大一部分中被观测到。 我们指出，结合关于四点函数g_NL的信息，自相互作用波动子模型的参数可以通过观测完全确定。 我们还讨论了g_NL的尺度依赖性及其对波动子模型的影响，并认为在理论上的n_{非线性函数}值低于观测灵敏度的情况下，它可能提供一个互补的探测手段。