Higher derivatives and power spectrum in effective single field inflation
arXiv:1407.8268 · doi:10.1088/1475-7516/2015/03/009
Abstract
We study next-to-leading corrections to the effective action of the curvature perturbation obtained by integrating out the coupled heavy isocurvature perturbation. These corrections result from including higher order derivative operators, weighted by the mass scale of the heavy physics, in the effective theory expansion. We find that the correction terms are suppressed by the ratio of the Hubble parameter to the heavy mass scale. The corresponding corrections to the power spectrum of the curvature perturbation are presented for a simple illustrative example.
(v1) 11 pages, 1 figure; (v2) discussions improved and typos corrected, to appear in Journal of Cosmology and Astroparticle Physics
References in corpus (6)
- The Effective Field Theory of Inflation
- Effective Field Theory for Inflation
- Mass hierarchies and non-decoupling in multi-scalar field dynamics
- Heavy fields, reduced speeds of sound and decoupling during inflation
- Effective field theory of weakly coupled inflationary models
- On degenerate models of cosmic inflation