Primordial non-Gaussianity from different cosmological scenarios

Details Primordial non-Gaussianity from different cosmological scenarios Primordial non-Gaussianity from different cosmological scenarios

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005nuphs.148...56b&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 148, p. 56-63.

Physics

Nuclear Physics

3

Scientific paper

We review recent results about the level of non-Gaussianity in the primordial density perturbations generated in various cosmological scenarios, spanning from the standard single-field models of slow-roll inflation to new alternative scenarios. Through a full calculation at second order in perturbation theory we provide all the tools necessary to determine the level of the primordial non-Gaussianity in the large-scale Cosmic Microwave Background (CMB) temperature anisotropies in any model of cosmological perturbations. In light of present and future CMB observations we stress the importance of non-Gaussianity as a key discriminator among competing cosmological scenarios.

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