paper

A left-right symmetric model with SU(2)-triplet fermions

arXiv:1110.6049 · doi:10.1103/PhysRevD.84.097301

Abstract

We consider an $S U (3)_{c} \otimes S U (2)_{L} \otimes S U (2)_{R} \otimes U (1)_{B - L}$ left-right symmetric model with three Higgs scalars including an $S U (2)_{L}$ doublet, an $S U (2)_{R}$ doublet and an $S U (2)_{L} \otimes S U (2)_{R}$ bidoublet. In addition to usual SU(2)-doublet fermions, our model contains SU(2)-triplet fermions with Majorana masses. The neutral components of the left-handed triplets can contribute a canonical seesaw while the neutral components of the right-handed triplets associated with the right-handed neutrinos can contribute a double/inverse-type seesaw. Our model can be embedded into an SO(10) grand unification theory where the triplets belong to the $45 = (1, 3, 1, 0) \oplus (1, 1, 3, 0) \oplus ...$ representations.

4 pages. To appear in Phys. Rev. D