Neutrino Properties from E_6 x SO(3) x Z(2)

Understand

The group E_6 for grand unification is combined with the generation symmetry group SO(3) x Z(2).

• The coupling matrices in the Yukawa interaction are identified with the vacuum expectation values of scalar flavons.
• The symmetric part of this 3x3 coupling matrix can be identified with the known up-quark hierarchy.
• The antisymmetric part is responsible for fermion mixings and CP violation.