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arXiv · 1301.1137

Focus Point in Gaugino Mediation ~ Reconsideration of the Fine-tuning Problem ~

Tsutomu T. Yanagida·Norimi Yokozaki
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Abstract

We reconsider the fine-tuning problem in SUSY models, motivated by the recent observation of the relatively heavy Higgs boson and non-observation of the SUSY particles at the LHC. Based on this thought, we demonstrate a focus point-like behavior in a gaugino mediation model, and show that the fine-tuning is indeed reduced to about 2 percent level if the ratio of the gluino mass to wino mass is about 0.4 at the GUT scale. We show that such a mass ratio may arise naturally in a product group unification model without the doublet-triplet splitting problem. This fact suggests that the fine-tuning problem crucially depends on the physics at the high energy scale.

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Tsutomu T. Yanagida, Norimi Yokozaki. 2013-06-24. Focus Point in Gaugino Mediation ~ Reconsideration of the Fine-tuning Problem ~. https://doi.org/10.1016/j.physletb.2013.04.043

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