Cosmological constant in scale-invariant theories
High Energy Physics - Phenomenology
2015-05-20 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
The incorporation of a small cosmological constant within radiatively-broken scale-invariant models is discussed. We show that phenomenologically consistent scale-invariant models can be constructed which allow a small positive cosmological constant, providing certain relation between the particle masses is satisfied. As a result, the mass of the dilaton is generated at two-loop level. Another interesting consequence is that the electroweak symmetry-breaking vacuum in such models is necessarily a metastable `false' vacuum which, fortunately, is not expected to decay on cosmological time scales.
Cite
@article{arxiv.1012.4848,
title = {Cosmological constant in scale-invariant theories},
author = {Robert Foot and Archil Kobakhidze and Raymond R. Volkas},
journal= {arXiv preprint arXiv:1012.4848},
year = {2015}
}
Comments
10 pages; v2: clarifying remarks added, to appear in Physical Review D