Non-Gaussianity in DHOST inflation

@article{Brax2022NonGaussianityID,
  title={Non-Gaussianity in DHOST inflation},
  author={Philippe Brax and Andrei Lazanu},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2022},
  volume={2022}
}
  • P. Brax, A. Lazanu
  • Published 12 October 2021
  • Physics
  • Journal of Cosmology and Astroparticle Physics
DHOST inflation models where deviations from a pure de Sitter background are induced by an axion-like potential can lead to large non-Gaussianities. We investigate the nature of non-Gaussianities in these models and compare to the results given by the Planck experiment. The overlap between the DHOST non-Gaussianities and the equilateral, orthogonal and local templates can be rendered arbitrarily small. On the other hand, this does not preclude DHOST models from showing large non-Gaussianities… 

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