General formula for the running of local fNL
Cosmology and Nongalactic Astrophysics
2015-06-11 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We compute the scale dependence of fNL for models of multi-field inflation, allowing for an arbitrary field space metric. We show that, in addition to multi-field effects and self interactions, the curved field space metric provides another source of scale dependence, which arises from the field-space Riemann curvature tensor and its derivatives. The scale dependence may be detectable within the near future if the amplitude of fNL is not too far from the current observational bounds.
Keywords
Cite
@article{arxiv.1210.1851,
title = {General formula for the running of local fNL},
author = {Christian T. Byrnes and Jinn-Ouk Gong},
journal= {arXiv preprint arXiv:1210.1851},
year = {2015}
}
Comments
(v1) 9 pages, 1 figure; (v2) 10 pages, minor updates including the title, to appear in Physics Letters B