Some cosmological consequences of a breaking of the Einstein equivalence principle
Abstract
In this communication, we consider a wide class of extensions to General Relativity that break explicitly the Einstein Equivalence Principle by introducing a multiplicative coupling between a scalar field and the electromagnetic Lagrangian. In these theories, we show that 4 cosmological observables are intimately related to each other: a temporal variation of the fine structure constant, a violation of the distance-duality relation, the evolution of the cosmic microwave background (CMB) temperature and CMB spectral distortions. This enables one to put very stringent constraints on possible violations of the distance-duality relation, on the evolution of the CMB temperature and on admissible CMB spectral distortions using current constraints on the fine structure constant. Alternatively, this offers interesting possibilities to test a wide range of theories of gravity by analyzing several data sets concurrently.
Keywords
Cite
@article{arxiv.1504.02676,
title = {Some cosmological consequences of a breaking of the Einstein equivalence principle},
author = {A. Hees and O. Minazzoli and J. Larena},
journal= {arXiv preprint arXiv:1504.02676},
year = {2015}
}
Comments
4 pages, proceedings of the 50th Rencontres de Moriond, Gravitation Session: "100 years after GR", 21-28 March 2015, one reference added