Generating curvature perturbations with MSSM flat directions
Tomohiro Matsuda · arXiv (Cornell University) · 2007
We consider the possibility that chaotic inflation is driven by a Minimal Supersymmetric Standard Model (MSSM) flat direction or a sneutrino. The discrepancy between our present study and past studies is in the mechanism for generating the curvature perturbations. We consider curvature perturbations generated by instant preheating at the end of inflation, instead of a conventional curvature perturbation generated by a fluctuation related to an inflaton field. Our simple mechanism relaxes some serious constraints that appeared in past studies, making chaotic inflation driven by a MSSM flat direction or a sneutrino more plausible.