Primordial Non-Gaussianities from the Trispectra in Multiple Field Inflationary Models. (arXiv:0906.1345v2 [astro-ph.CO] UPDATED)

We investigate the primordial non-Gaussianities from the trispectra inmulti-field inflation models, which can be seen as generalization ofmulti-field $k$-inflation and multi-DBI inflation. We derive the fullfourth-order perturbation action for the inflaton fields and evaluate thefour-point correlation functions for the perturbations » Full text »