TY - JOUR
T1 - Focus point in gaugino mediation - Reconsideration of the fine-tuning problem
AU - Yanagida, Tsutomu T.
AU - Yokozaki, Norimi
N1 - Funding Information:
The work of NY is supported in part by JSPS Research Fellowships for Young Scientists . This work is also supported by the World Premier International Research Center Initiative (WPI Initiative) , MEXT , Japan.
PY - 2013/5/24
Y1 - 2013/5/24
N2 - 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.
AB - 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.
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U2 - 10.1016/j.physletb.2013.04.043
DO - 10.1016/j.physletb.2013.04.043
M3 - Article
AN - SCOPUS:84877589389
VL - 722
SP - 355
EP - 359
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 4-5
ER -