Natural Supersymmetry and b -> s gamma constraints

Details Natural Supersymmetry and b -> s gamma constraints Natural Supersymmetry and b -> s gamma constraints

2011-12-08

arxiv.org/abs/1112.1944v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 4 figures; version to be published in PLB

Scientific paper

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.

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