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Non-Gaussianity and gravitational wave background in curvaton with a double well potential

We study the density perturbation by a curvaton with a double well potential and estimate the nonlinear parameters for non-Gaussianity and the amplitude of gravitational wave background generated during inflation. The predicted nonlinear parameters strongly depend on the size of a curvaton self-coupling constant as well as the reheating temperature after inflation for a given initial amplitude of the curvaton. The difference from usual massive self-interacting curvaton is also emphasized.

preprint2010arXivOpen access
Ki-Young ChoiOsamu Seto
astro-ph.COhep-ph
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Ki-Young ChoiOsamu Seto

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