Effects of Squark Processes on the Axino CDM Abundance
High Energy Physics - Phenomenology
2009-11-07 v1 Astrophysics
Abstract
We investigate the role of an effective dimension-4 axino-quark-squark coupling in the thermal processes producing stable cold axino relics in the early Universe. We find that, while the induced squark and quark scattering processes are always negligible, squark decays become important in the case of low reheat temperature and large gluino mass. The effect can tighten the bounds on the scenario from the requirement that cold dark matter axinos do not overclose the Universe.
Cite
@article{arxiv.hep-ph/0206119,
title = {Effects of Squark Processes on the Axino CDM Abundance},
author = {Laura Covi and Leszek Roszkowski and Michael Small},
journal= {arXiv preprint arXiv:hep-ph/0206119},
year = {2009}
}
Comments
20 pages, 9 figures, uses JHEP3.cls