A Dark Matter Candidate from an Extra (Non-Universal) Dimension
Abstract
We show that a recently constructed five-dimensional (5D) model with gauge-Higgs unification and explicit Lorentz symmetry breaking in the bulk, provides a natural dark matter candidate. This is the lightest Kaluza-Klein particle odd under a certain discrete Z_2 symmetry, which has been introduced to improve the naturalness of the model, and resembles KK-parity but is less constraining. The dark matter candidate is the first KK mode of a 5D gauge field and electroweak bounds force its mass above the TeV scale. Its pair annihilation rate is too small to guarantee the correct relic abundance; however coannihilations with colored particles greatly enhance the effective annihilation rate, leading to realistic relic densities.
Cite
@article{arxiv.hep-ph/0612286,
title = {A Dark Matter Candidate from an Extra (Non-Universal) Dimension},
author = {Marco Regis and Marco Serone and Piero Ullio},
journal= {arXiv preprint arXiv:hep-ph/0612286},
year = {2010}
}
Comments
26 pages, 10 figures; v2: fig.1 corrected, one reference and some comments added, conclusions unchanged. Version to appear in JHEP