Physics Beyond the Standard Model: Focusing on the Muon Anomaly
  We present a model based on the implication of an exceptional E_{6}-GUT symmetry for the anomalous magnetic moment of the muon. We follow a particular chain of breakings with Higgses in the 78 and 351 representations. We analyse the radiative correction contributions to the muon mass and the effects of the breaking of the so-called Weinberg symmetry. We also estimate the range of values of the parameters of our model. 
H. Chavez (UFRJ), C. N. Ferreira (CEFET-Campos) and J.A. Helayel-Neto   (CBPF)