The masses of vector supermultiplet and Higgs supertriplet in supersymmetric SU(5) model

The masses of vector supermultiplet and Higgs supertriplet in the standard supersymmetric SU(5) model are calculated. Taking into account uncertainties related with the initial gauge coupling constants and threshold corrections we find that in standard supersymmetric SU(5) model the scale of the supersymmetry breaking could be up to 50 TeV. We find that in the extensions of the standard SU(5) supersymmetric model it is possible to increase the supersymmetry breaking scale up to O(1012) GeV. In the standard SU(5) supersymmetric model it is possible to increase the GUT scale up to 5 · 1017 GeV provided that the masses of chiral superoctets and supertriplets are m3,8 ∼ O(1013) GeV. We also propose a SU(5) supersymmetric model with 6 light superdoublets and superoctet with a mass O(109) GeV.