Large non-Gaussianities in the Effective Field Theory Approach to Single-Field Inflation: the Trispectrum

Details Large non-Gaussianities in the Effective Field Theory Approach to Single-Field Inflation: the Trispectrum Large non-Gaussianities in the Effective Field Theory Approach to Single-Field Inflation: the Trispectrum

2010-06-28

arxiv.org/abs/1006.5411v1

JCAP 1009:035,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

29 pages, 13 figures

Scientific paper

10.1088/1475-7516/2010/09/035

We perform the analysis of the trispectrum of curvature perturbations generated by the interactions characterizing a general theory of single-field inflation obtained by effective field theory methods. We find that curvature-generated interaction terms, which can in general give an important contribution to the amplitude of the four-point function, show some new distinctive features in the form of their trispectrum shape-function. These interesting interactions are invariant under some recently proposed symmetries of the general theory and, as shown explicitly, do allow for a large value of the trispectrum.

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