Focus point in gaugino mediation - Reconsideration of the fine-tuning problem

Tsutomu T. Yanagida, Norimi Yokozaki

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


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% 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.

Original languageEnglish
Pages (from-to)355-359
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number4-5
Publication statusPublished - 2013 May 24
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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