The power spectrum for a multi-component inflaton to second-order corrections in the slow-roll expansion

Jin Ook Gong, Ewan D. Stewart

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

We derive the power spectrum Ρ(k) of the density perturbations produced during inflation up to second-order corrections in the standard slow-roll approximation for an inflaton with more than one degree of freedom. We also present the spectral index n up to first-order corrections including previously missing terms, and the running dn/d lnk to leading order.

Original languageEnglish
Pages (from-to)213-222
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume538
Issue number3-4
DOIs
StatePublished - 4 Jul 2002

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