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Article Dans Une Revue Journal of Cosmology and Astroparticle Physics Année : 2022

Non-Gaussianity in DHOST inflation

Résumé

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 as exemplified by their reduced bispectrum. As a result, they could be probed by future experiments and also by a more thorough analysis of the existing Planck data.

Dates et versions

hal-03378005 , version 1 (14-10-2021)

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Citer

Philippe Brax, Andrei Lazanu. Non-Gaussianity in DHOST inflation. Journal of Cosmology and Astroparticle Physics, 2022, 01 (01), pp.026. ⟨10.1088/1475-7516/2022/01/026⟩. ⟨hal-03378005⟩
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