Particle spectroscopy of supersymmetric SU(5) in light of the 125 GeV Higgs boson and muon g-2 data

The discovery of the Higgs boson at the Large Hadron Collider (LHC) has a great impact on the minimal supersymmetric extension of the Standard Model (MSSM). In the context of the constrained MSSM (CMSSM) and its extension with nonuniversal masses for the MSSM Higgs doublets, sparticles with masses > 1 TeV are necessary to reproduce the observed Higgs boson mass of 125-126 GeV. On the other hand, there appears to be a significant amount of discrepancy between the measured muon g - 2 and the Standard Model prediction. A successful explanation of this discrepancy in the MSSM requires new contributions involving relatively light sparticles with masses < 1 TeV. In this paper, we attempt to accommodate the two conflicting requirements in a SU(5) inspired extension of the CMSSM. We assign nonuniversal but flavor blind soft supersymmetry breaking masses to the scalar components in 5, <(5)over bar> and 10 matter supermultiplets. The two MSSM Higgs doublets in the 5, (5) over bar representations of SU(5) are also assigned unequal soft mass(2) at M-GUT. We identify parameter regions which can simultaneously accommodate the observed Higgs boson mass and the muon g - 2 data, and which are compatible with other phenomenological constraints such as neutralino dark matter relic abundance and rare B-meson decays. Some regions of the allowed parameter space will be explored at the upgraded LHC and by dark matter direct detection experiments.