Cosmological acceleration, varying couplings, and Lorentz breaking

Preprint

14 October 2003

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/0310344

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.

Keywords

COSMOLOGICAL ACCELERATION
CANDIDATE FUNDAMENTAL
FUNDAMENTAL THEORIES
DISPERSION RELATIONS
VARYING COUPLINGS
LORENTZ BREAKING

All Related Versions

Version 1, 2003-10-14, ArXiv
Published version: Physical Review D, 69 (8), 083513.

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