2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/182170We calculate the three-point correlation function evaluated at horizon crossing for a set of interacting scalar fields coupled to gravity during inflation. This provides the initial condition for the three-point function of the curvature perturbation in the Sasaki--Stewart δN formulation. We find that the effect is small, of the order of a slow-roll parameter, and that the non-gaussianity can be determined on large scales once the unperturbed background evolution is known. As an example of the use of our formalism, we calculate the primordial non-gaussianity arising in a model of assisted inflation.24 pages, JCAP LaTeX style; replaced with version accepted by JCAP. Some corrections to Sections 2 and 5, conclusions unchangedAstrophysicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theorytext