Correlated primordial spectra in effective theory of inflation

Abstract

We derive a direct correlation between the power spectrum and bispectrum of the primordial curvature perturbation in terms of the Goldstone mode based on the effective field theory approach to inflation. We show examples of correlated bispectra for the parametrized feature models presented by the Planck collaboration. We also discuss the consistency relation and the validity of our explicit correlation between the power spectrum and bispectrum.

Comments: (v1) 14 pages, 1 figure; (v2) 15 pages, minor revision including more references and a footnote, to appear in Physical Review D