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Using two-loop renormalization group equations implementing the decoupling ofheavy scalars, Effective SUSY scenarios are studied in the limit in which thereis a single low energy Higgs field. Gauge coupling unification is shown to holdwith similar or better precision than in standard MSSM scenarios. b-tauunification is examined, and Higgs masses are computed using the effectivepotential, including two-loop contributions from scalars. A 125 GeV Higgs iscompatible with stops/sbottoms at around 300 GeV with non-universal boundaryconditions at the scale of the heavy sparticles if some of the trilinearcouplings at this scale take values of the order of 1-2 TeV; if moreconstrained boundary conditions inspired by msugra or gauge mediation are setat a higher scale, heavier colored sparticles are required in general. Finally,since the decoupled RG flow for third-generation scalar masses departs verysignificantly from the MSSM DR-bar one, tachyon bounds for light scalars arerevisited and shown to be relaxed by up to a TeV or more.

Decoupling heavy sparticles in Effective SUSY scenarios: Unification, Higgs masses and tachyon bounds