Local scale-dependent non-gaussian curvature perturbations at cubic order

@inproceedings{Bramante2011LocalSN,
  title={Local scale-dependent non-gaussian curvature perturbations at cubic order},
  author={Joseph Bramante and Jason Kumar},
  year={2011}
}
We calculate non-Gaussianities in the bispectrum and trispectrum arising from the cubic term in the local expansion of the scalar curvature perturbation. We compute to three-loop order and for general momenta. A procedure for evaluating the leading behavior of the resulting loop-integrals is developed and discussed. Finally, we survey unique non-linear signals which could arise from the cubic term in the squeezed limit. In particular, it is shown that loop corrections can cause fNLsq. to change… CONTINUE READING