Probing High-Scale and Split Supersymmetry with Higgs mass measurements

We study the range of Higgs masses predicted by High-Scale Supersymmetry and by Split Supersymmetry, using the matching condition for the Higgs quartic coupling determined by the minimal field content. In the case of Split Supersymmetry, we compute for the first time the complete next-to-leading order corrections, including two-loop renormalization group equations and one loop threshold effects. These corrections reduce the predicted Higgs mass by a few GeV. We investigate the impact of the recent LHC Higgs searches on the scale of supersymmetry breaking. In particular, we show that an upper hound of 127 GeV on the Higgs mass implies an upper bound on the scale of Split Supersymmetry of about 10(8) GeV, while no firm conclusion can yet be drawn for High-Scale Supersymmetry. (C) 2012 Elsevier B.V. All rights reserved.