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

@article{Choi2010NonGaussianityAG,
  title={Non-Gaussianity and gravitational wave background in curvaton with a double well potential},
  author={Kiwoon Choi and O. Seto},
  journal={Physical Review D},
  year={2010},
  volume={82},
  pages={103519}
}
We study the density perturbation by a curvaton with a double well potential and give analytical expressions for the observables such as nonlinear parameters f{sub NL}, g{sub NL} and tensor-to-scalar ratio r{sub T} with emphasizing the differences from the simple quadratic potential. We show that the level of non-Gaussianity and the tensor-to-scalar ratio depends crucially on the reheating temperature as well as the curvaton self-coupling constant for a given initial amplitude of the curvaton… Expand

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