Ward Identities for Scale and Special Conformal Transformations in Inflation
High Energy Physics - Theory
2016-01-19 v3 Cosmology and Nongalactic Astrophysics
Abstract
We derive the general Ward identities for scale and special conformal transformations in theories of single field inflation. Our analysis is model independent and based on symmetry considerations alone. The identities we obtain are valid to all orders in the slow roll expansion. For special conformal transformations, the Ward identities include a term which is non-linear in the fields that arises due to a compensating spatial reparametrization. Some observational consequences are also discussed.
Keywords
Cite
@article{arxiv.1507.06017,
title = {Ward Identities for Scale and Special Conformal Transformations in Inflation},
author = {Nilay Kundu and Ashish Shukla and Sandip P. Trivedi},
journal= {arXiv preprint arXiv:1507.06017},
year = {2016}
}
Comments
42 Pages. v3: Section on checks of the Ward identities added. The JHEP accepted version