| Abstract: | In this paper, we use the result in [C.Y. Sun and D.H. Zhang, arXivastro-ph/0510709] to calculate the non-Gaussianity of the racetrack models in[J.J. Blanco-Pillado, et al., JHEP 0411 (2004) 063; arXivhep-th/0406230]and [J.J. Blanco-Pillado, et al., arXivhep-th/0603129]. The two models give different non-Gaussianities. Both of them are reasonable. However, we find that, for multi-field inflationary models with the non-trivial metric of the field space,the condition of the slow-roll cannot guarantee small non-Gaussianities. |
