The inflationary trispectrum

Seery, David, Lidsey, James E and Sloth, Martin S (2007) The inflationary trispectrum. Journal of Cosmology and Astroparticle Physics, 2007 (1). ISSN 1475-7516

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We calculate the trispectrum of the primordial curvature perturbation generated by an epoch of slow-roll in. ation in the early universe, and demonstrate that the non-Gaussian signature imprinted at horizon crossing is unobservably small, of order lambda NL less than or similar to r/50, where r < 1 is the tensor-to-scalar ratio. Therefore any primordial non-Gaussianity observed in future microwave background experiments is likely to have been synthesized by gravitational effects on superhorizon scales. We discuss the application of Maldacena's consistency condition to the trispectrum.

Item Type: Article
Additional Information: Article Number: 027
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: David Seery
Date Deposited: 06 Feb 2012 19:20
Last Modified: 02 Apr 2012 11:17
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