Cosmological acceleration, varying couplings, and Lorentz breaking
Astrophysics
2009-11-10 v1 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
Many candidate fundamental theories contain scalar fields that can acquire spacetime-varying expectation values in a cosmological context. Such scalars typically obey Lorentz-violating effective dispersion relations. We illustrate this fact within a simple supergravity model that also exhibits the observed late-time cosmological acceleration and implies varying electromagnetic couplings.
Cite
@article{arxiv.astro-ph/0310344,
title = {Cosmological acceleration, varying couplings, and Lorentz breaking},
author = {Orfeu Bertolami and Ralf Lehnert and Robertus Potting and Andre Ribeiro},
journal= {arXiv preprint arXiv:astro-ph/0310344},
year = {2009}
}
Comments
11 pages, 9 figures, 1 table