Neutralino Dark Matter with Light Staus
Abstract
In spite of rapid experimental progress, windows for light superparticles remain. One possibility is a ~100 GeV tau slepton whose t-channel exchange can give the correct thermal relic abundance for a relatively light neutralino. We pedagogically review how this region arises and identify two distinct scenarios that will be tested soon on multiple fronts. In the first, the neutralino has a significant down-type higgsino fraction and relatively large rates at direct detection experiments are expected. In the second, there is large mixing between two relatively light staus, which could lead to a significant excess in the Higgs boson branching ratio to photons. In addition, electroweak superpartners are sufficiently light that direct searches should be effective.
Cite
@article{arxiv.1309.7351,
title = {Neutralino Dark Matter with Light Staus},
author = {Aaron Pierce and Nausheen R. Shah and Katherine Freese},
journal= {arXiv preprint arXiv:1309.7351},
year = {2013}
}
Comments
Improved discussion of vacuum stability constraints. Updated references. 25 pages, 4 figures