Anomalies, equivalence and renormalization of cosmological frames

Mario Herrero-Valea
Phys. Rev. D 93, 105038 – Published 24 May 2016

Abstract

We study the question of whether two frames of a given physical theory are equivalent or not in the presence of quantum corrections. By using field theory arguments, we claim that equivalence is broken in the presence of anomalous symmetries in one of the frames. This is particularized to the case of the relation between the Einstein and Jordan frames in scalar-tensor theories used to describe early Universe dynamics. Although in this case a regularization that cancels the anomaly exists, the renormalized theory always develops a nonvanishing contribution to the S matrix that is present only in the Jordan frame, promoting the different frames to different physical theories that must be UV completed in a different way.

  • Received 2 March 2016

DOI:https://doi.org/10.1103/PhysRevD.93.105038

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Particles & FieldsGravitation, Cosmology & Astrophysics

Authors & Affiliations

Mario Herrero-Valea

  • Instituto de Física Teórica UAM/CSIC, C/Nicolas Cabrera, 13-15, C.U. Cantoblanco, 28049 Madrid, Spain and Departamento de Física Teórica, Universidad Autónoma de Madrid, 20849 Madrid, Spain

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Issue

Vol. 93, Iss. 10 — 15 May 2016

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