Residual symmetries in the lepton mass matrices

Abstract

It has been suggested that residual symmetries in the charged-lepton and neutrino mass matrices can possibly reveal the flavour symmetry group of the lepton sector. We review the basic ideas of this purely group-theoretical approach and discuss some of its results. Finally, we also list its shortcomings.

Comments: 7 pages no figures, talk presented at XXXVII International Conference of Theoretical Physics, "Matter to the Deepest," Ustron, September 1-6, 2013