The muon g-2 in a SU(7) left-right symmetric model with mirror fermions
  We have studied a left-right symmetric model with mirror fermions based in a grand unified SU(7) model in order to account for the muon anomaly. The Higgs sector of the model contains two Higgs doublets and the hierarchy condition $\upsilon_{L}\ll\upsilon_{R}$ can be achieved by using two additional Higgs singlets, one even and other odd under   $\mathcal{D}$-parity. We show that there is a wide range of values for the mass parameters of the model that is consistent with the $g-2$ lepton anomalies.   Radiative correction to the mass of the ordinary fermions are shown to be small. 
H. Chavez and J.A. Martins Simoes