A Bound Concerning Primordial Non-Gaussianity
arXiv:astro-ph/0507608 · doi:10.1088/1475-7516/2005/10/005
Abstract
Seery and Lidsey have calculated the three-point correlator of the light scalar fields, a few Hubble times after horizon exit during inflation. Lyth and Rodriguez have calculated the contribution of this correlator to the three-point correlator of the primordial curvature perturbation. We calculate an upper bound on that contribution, showing that it is too small ever to be observable.
5 pages, typos corrected, added references for section 1