Priomordial non-Gaussian features from DBI Galileon inflation

Understand

We have studied primordial non-Gaussian features from a model of potential driven single field DBI Galileon inflation.

• We have computed the bispectrum from the three point correlation function considering all possible cross correlation between scalar and tensor modes from the proposed setup.
• Further, we have computed the trispectrum from four point correlation function considering the contribution from contact interaction, scalar and graviton exchange diagrams in the in-in picture.
• Finally we have obtained the non-Gaussian consistency conditions from the four point correlator, which results in partial violation of the Suyama-Yamaguchi four-point consistency relation.