Non-Gaussian signatures of general inflationary trajectories
Cosmology and Nongalactic Astrophysics
2015-06-17 v1 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
We carry out a numerical calculation of the bispectrum in generalised trajectories of canonical, single--field inflation. The trajectories are generated in the Hamilton-Jacobi (HJ) formalism based on Hubble Slow Roll (HSR) parameters. The calculation allows generally shape and scale dependent bispectra, or dimensionless , in the out-of-slow-roll regime. The distributions of for various shapes and HSR proposals are shown as an example of how this procedure can be used within the context of Monte Carlo exploration of inflationary trajectories. We also show how allowing out-of-slow-roll behaviour can lead to a bispectrum that is relatively large for equilateral shapes.
Keywords
Cite
@article{arxiv.1311.3224,
title = {Non-Gaussian signatures of general inflationary trajectories},
author = {Jonathan S. Horner and Carlo R. Contaldi},
journal= {arXiv preprint arXiv:1311.3224},
year = {2015}
}
Comments
13 pages, 7 figures