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We examine the issue of fine tuning in the MSSM with GUT-scale boundaryconditions. We identify specific unification patterns and mass relations thatcan lead to a significant lowering of the fine tuning due to gauginos, scalars,and the \mu\ parameter, relative to the simplest unification conditions. Wefocus on a phenomenologically interesting region that is favored by the Higgsmass and the relic density where the dark matter is a nearly pure higgsino withmass given by \mu~1 TeV while the scalars and gauginos have masses in themulti-TeV regime. There, we find that the fine tuning can be reduced to thelevel of a few percent. Despite the gluino mass in the ballpark of 2 TeV,resulting mass spectra will be hard to explore at the LHC, but good prospectsfor detection come from dark matter direct detection experiments. Finally, wedemonstrate with a specific example how the conditions and mass relationsgiving low fine tuning can originate in the context of supergravity and GrandUnified Theories.

Low fine tuning in the MSSM with higgsino dark matter and unification constraints