Large non-Gaussianities with intermediate shapes from quasi-single-field inflation
Author(s)Chen, Xingang; Wang, Yi
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We study the slow-roll inflation models, where the inflaton slow-rolls along a trajectory whose orthogonal directions are lifted by potentials with masses of order the Hubble parameter. In these models large non-Gaussianities can be generated through the transformation from the isocurvature modes to the curvature mode, once the inflaton trajectory turns. We find large bispectra with a one-parameter family of novel shapes, interpolating between the equilateral and local shape. According to the in-in formalism, the shapes of these non-Gaussianities are different from a simple projection from the isocurvature non-Gaussian correlation functions.
DepartmentMassachusetts Institute of Technology. Center for Theoretical Physics
Physical Review D
American Physical Society
Chen, Xingang, and Yi Wang. "Large non-Gaussianities with intermediate shapes from quasi-single-field inflation." Physical Review D 81.6 (2010): 063511. © 2010 The American Physical Society.
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