Symmetries and Loops in Inflation
Journal
Journal of High Energy Physics
Journal Volume
2013
Journal Issue
2
Date Issued
2012-10-30
Author(s)
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.
Subjects
Cosmology of Theories beyond the SM | Renormalization Regularization and Renormalons | Space-Time Symmetries; High Energy Physics - Theory; High Energy Physics - Theory; astro-ph.CO; High Energy Physics - Phenomenology
SDGs
Description
31 pages, 1 figure; v2: references added + pedagogical improvements
of Sec. 4
of Sec. 4
Type
journal article