An SO(10) GUT Model With Lopsided Mass Matrix and Neutrino Mixing Angle theta_13

Details An SO(10) GUT Model With Lopsided Mass Matrix and Neutrino Mixing Angle theta_13 An SO(10) GUT Model With Lopsided Mass Matrix and Neutrino Mixing Angle theta_13

2005-10-27

arxiv.org/abs/hep-ph/0510353v1

Phys.Lett. B633 (2006) 755-760

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages

Scientific paper

10.1016/j.physletb.2006.01.005

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 $\sin^22\theta_{13}\simeq 0.074$, which is significantly larger than that of the original lopsided model.

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