Accelerated expansion and the Goldstone ghost
High Energy Physics - Theory
2016-09-06 v2 Astrophysics
General Relativity and Quantum Cosmology
Abstract
A vacuum instability due to a massless ghost in a hidden sector can lead to an effective equation of state for dark energy that changes smoothly from at large redshifts, to today, to in the future. We discuss how this ghost can be the Goldstone boson of Lorentz symmetry breaking, and we find that this breaking in the hidden sector should occur at a scale below 10 KeV. The normal particles that are produced along with the ghosts are then predominantly neutrinos.
Cite
@article{arxiv.hep-th/0404109,
title = {Accelerated expansion and the Goldstone ghost},
author = {B. Holdom},
journal= {arXiv preprint arXiv:hep-th/0404109},
year = {2016}
}
Comments
12 pages, 2 figures, some improvement in discussion, published version