Relic Abundance of Neutralinos in Heterotic String Theory: Weak Coupling vs. Strong Coupling
High Energy Physics - Phenomenology
2010-02-03 v1 High Energy Physics - Theory
Abstract
The relic abundance of stable neutralinos is investigated in heterotic string theory when supersymmetry is spontaneously broken by hidden-sector gaugino condensates. In the weak coupling regime, very large scalar masses (compared to gaugino masses) are shown to lead to a too large relic abundance of the neutralinos, incompatible with cosmological observations in most of parameter space. The problem does not arise in the strong coupling regime (heterotic M-theory) because there scalar and gaugino masses are generically of the same order of magnitude.
Cite
@article{arxiv.hep-ph/9805397,
title = {Relic Abundance of Neutralinos in Heterotic String Theory: Weak Coupling vs. Strong Coupling},
author = {Y. Kawamura and H. P. Nilles and M. Olechowski and M. Yamaguchi},
journal= {arXiv preprint arXiv:hep-ph/9805397},
year = {2010}
}
Comments
24 pages, latex, no figures