Effective theory of large-scale structure with primordial non-Gaussianity
Effective theory of large-scale structure with primordial non-Gaussianity
复制标题
具有原初非高斯性的大尺度结构的有效理论
DOI：
10.1088/1475-7516/2015/11/024
复制
发表时间：
2015
影响因子：
6.4
通讯作者：
D. V. D. Woude
中科院分区：
文献类型：
--
作者：
Valentin Assassi;D. Baumann;E. Pajer;Y. Welling;D. V. D. Woude
我们发展了非高斯初始条件下大尺度结构的有效理论。暗物质运动方程中的有效应力张量包含了新的算符，这些算符来源于原初双谱的压缩极限。参数化的压缩极限的缩放和角度的依赖性，捕捉大类的原始非高斯。在这个参数化，我们分类的有效理论的可能贡献。我们明确地表明，所有的条款一致的对称性产生粗粒化的暗物质运动方程及其初始条件。我们还证明了该系统在重整化下是封闭的，因此校正项的基础是完整的。数值计算了物质功率谱和双谱的相关修正，并讨论了它们的相对重要性。
We develop the effective theory of large-scale structure for non-Gaussian initial conditions. The effective stress tensor in the dark matter equations of motion contains new operators, which originate from the squeezed limit of the primordial bispectrum. Parameterizing the squeezed limit by a scaling and an angular dependence, captures large classes of primordial non-Gaussianity. Within this parameterization, we classify the possible contributions to the effective theory. We show explicitly how all terms consistent with the symmetries arise from coarse graining the dark matter equations of motion and its initial conditions. We also demonstrate that the system is closed under renormalization and that the basis of correction terms is therefore complete. The relevant corrections to the matter power spectrum and bispectrum are computed numerically and their relative importance is discussed.
影响因子：
6.5
作者：
Ade, P. A. R.;Aghanim, N.;Zonca, A.
通讯作者：
Zonca, A.