A bound concerning primordial non-Gaussianity

David H Lyth, Ignacio Zaballa
2005 Journal of Cosmology and Astroparticle Physics  
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.
doi:10.1088/1475-7516/2005/10/005 fatcat:ieegla4xrfhuvahnumdy6ife4q