An SO(10) GUT Model With Lopsided Mass Matrix and Neutrino Mixing Angle theta_13
arXiv:hep-ph/0510353 · doi:10.1016/j.physletb.2006.01.005
Abstract
An alternative supersymmetric SO(10) grand unification model with lopsided fermion mass matrices is introduced. It generates a large solar-neutrino-mixing angle through the neutrinos' Dirac mass matrix constrained by the SO(10) group structure, avoiding the fine-tuning required in the Majorana mass matrix of right-handed neutrinos. The model fits well the known data on masses and mixings of quarks and leptons, and predicts a sizable lepton mixing $\sin^22θ_{13}\simeq 0.074$, which is significantly larger than that of the original lopsided model.
9 pages