Neutrino Mixing in Unified Extended Seesaw Model

The seesaw mechanism can play a key role in the generation of the leptonic mixing in unified models. We consider an unified model with a family symmetry and extended seesaw, and obtain viable fermion masses and mixing (leptonic mixing is close to tri-bi-maximal).Comment: Proceedings submission for SUSY09, 4 pages, 1 figur