Higgs phenomenology in the supersymmetric grand unified theory with the Hosotani mechanism

Abstract

The supersymmetric grand unified theory with the Hosotani mechanism predicts the existence of adjoint chiral supermultiplets at the SUSY breaking scale. In particular, the SU(2) triplet and the singlet chiral superfields affect the Higgs sector. We investigate the contributions from these adjoint chiral multiplets to the masses of the Higgs sector particles and their couplings to the standard model particles. We show that the predicted values of the Higgs sector parameters deviate from the standard model and the minimal supersymmetric standard model by O(1)% - O(10)%.