Non-Gaussianity from resonant curvaton decay

  title={Non-Gaussianity from resonant curvaton decay},
  author={A. Chambers and S. Nurmi and A. Rajantie},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
We calculate curvature perturbations in the scenario in which the curvaton field decays into another scalar field via parametric resonance. As a result of a nonlinear stage at the end of the resonance, standard perturbative calculation techniques fail in this case. Instead, we use lattice field theory simulations and the separate universe approximation to calculate the curvature perturbation as a nonlinear function of the curvaton field. For the parameters tested, the generated perturbations… Expand

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