摘要
We analyze the fine-tuning in the constrained minimal supersymmetric standard model in the light of the present and expected ATLAS and CMS searches for supersymmetry. Even with 10fb - 1 of data and no discovery of supersymmetry valid regions might remain with fine-tuning less than 20. Moreover we investigate the fine-tuning price of grand unification scale Yukawa coupling relations. Considering a 2σ constraint for (g-2) μ and fine-tuning less than 30 yields an allowed range of y τ /y b =[1.31,1.70], which points towards the alternative grand unification prediction y τ /y b =3/2. Relaxing the (g-2) μ constraint to 5σ extends the possible region to [1.02, 1.70], allowing for approximate b-τ Yukawa coupling unification. © 2012 American Physical Society.