New leading contributions to non-Gaussianity in single field inflation

The European Physical Journal C 2026 Open access

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Authors: Ignatios Antoniadis, Jules Cunat, Auttakit Chatrabhuti, Hiroshi Isono
DOI: 10.1140/epjc/s10052-026-15452-2
Cited by: 0
References: 31

Abstract

Abstract We compute the bispectrum of primordial density perturbations in CMB to second order in the slow-roll parameters of single field inflation. We correct previous results and found that next-to-leading order corrections can be of the same order as the leading order result in a large class of models, including hilltop inflation.

Fields of Study & Subjects

Cosmology and Gravitation Theories Geophysics and Gravity Measurements Solar and Space Plasma Dynamics

Publication details

Journal / source
The European Physical Journal C
Publisher
Springer Science and Business Media LLC
Volume
86
Issue
3
Publication date
25 March 2026
Language
EN