Scalar sextet in the 331 model with right-handed neutrinos

Abstract

A Higgs sextet is introduced in order to generate Dirac and Majorana neutrino masses in the 331 model with right-handed neutrinos. As will be seen, the present sextet introduction leads to a rich neutrino mass structure. The smallness of neutrino masses can be achieved via, for example, a seesaw limit. The fact that the masses of the charged leptons are not effected by their new Yukawa couplings to the sextet is convenient for generating small neutrino masses.

RevTeX4, 5 pages, no figure. To appear in Phys. Rev. D. Misprints removed (v.2)

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