A single-field consistency relation for the three-point function

被引：471

作者：

Creminelli, P ^{[1
]}

Zaldarriaga, M

机构：

[1] Harvard Univ, Jefferson Phys Lab, Cambridge, MA 02138 USA

[2] Harvard Univ, Dept Astron, Cambridge, MA 02138 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2004年 / 10期

关键词：

CMBR theory; cosmological perturbation theory; inflation;

D O I：

10.1088/1475-7516/2004/10/006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We point out the existence of a consistency relation involving the three-point function of scalar perturbations which is valid in any inflationary model, independently of the inflaton Lagrangian under the assumption that the inflaton is the only dynamical field. The three-point function in the limit in which one of the momenta is much smaller than the other two is fixed in terms of the power spectrum and its tilt. This relation, although very hard to verify experimentally, could be easily proved wrong by forthcoming data, thus ruling out any scenario with a single dynamical field in a model independent way.

引用

页码：101 / 107

页数：7