Natural Supersymmetry and b -> s gamma constraints
High Energy Physics - Phenomenology
2015-06-03 v2
Abstract
We investigate constraints from the observed branching ratio for b -> s gamma and fine-tuning in the framework of natural supersymmetry. The natural supersymmetry requires the large trilinear coupling of the stop sector, light higgsinos (a small mu parameter) and light stops, in order to reduce the fine-tuning in the Higgs sector while avoiding the LEP constraint. It is found that in such a scenario 5% (10%) level of fine-tuning is inevitable due to the b -> s gamma constraint even if the messenger scale is as low as 10^5 GeV (10^4 GeV), provided that the gaugino masses satisfy the GUT relation.
Keywords
Cite
@article{arxiv.1112.1944,
title = {Natural Supersymmetry and b -> s gamma constraints},
author = {Koji Ishiwata and Natsumi Nagata and Norimi Yokozaki},
journal= {arXiv preprint arXiv:1112.1944},
year = {2015}
}
Comments
13 pages, 4 figures; version to be published in PLB