Symmetries and Loops in Inflation
High Energy Physics - Theory
2015-06-11 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
Abstract
In this paper, we prove that the superhorizon conservation of the curvature perturbation zeta in single-field inflation holds as an operator statement. This implies that all zeta-correlators are time independent at all orders in the loop expansion. Our result follows directly from locality and diffeomorphism invariance of the underlying theory. We also explore the relationship between the conservation of zeta, the single-field consistency relation and the renormalization of composite operators.
Cite
@article{arxiv.1210.7792,
title = {Symmetries and Loops in Inflation},
author = {Valentin Assassi and Daniel Baumann and Daniel Green},
journal= {arXiv preprint arXiv:1210.7792},
year = {2015}
}
Comments
31 pages, 1 figure; v2: references added + pedagogical improvements of Sec. 4