Tachyon mediated non-Gaussianity

  title={Tachyon mediated non-Gaussianity},
  author={B. Dutta and J. Kumar and L. Leblond},
  journal={Physical Review D},
  • B. Dutta, J. Kumar, L. Leblond
  • Published 2008
  • Physics
  • Physical Review D
  • We describe a general scenario where primordial non-Gaussian curvature perturbations are generated in models with extra scalar fields. The extra scalars communicate to the inflaton sector mainly through the tachyonic (waterfall) field condensing at the end of hybrid inflation. These models can yield significant non-Gaussianity of the local shape, and both signs of the bispectrum can be obtained. These models have cosmic strings and a nearly flat power spectrum, which together have been recently… CONTINUE READING
    14 Citations