Tri-bimaximal Neutrino Mixing and CKM Matrix in a SU(5)x(d)T Model

Abstract

In this talk, we present a model based on SU(5)x(d)T which successfully gives rise to near tri-bimaximal leptonic mixing as well as realistic CKM matrix elements for the quarks. The Georgi-Jarlskog relations for three generations are also obtained. Due to the (d)T transformation property of the matter fields, the b-quark mass can be generated only when the (d)T symmetry is broken, giving a dynamical origin for the hierarchy between m_b and m_t. There are only nine operators allowed in the Yukawa sector up to at least mass dimension seven due to an additional Z12 x Z12' symmetry, which also forbids, up to some high orders, operators that lead to proton decay. The resulting model has a total of nine parameters in the charged fermion and neutrino sectors, and hence is very predictive. In addition to the prediction for theta13 ~ theta_c/3sqrt{2}, the model gives rise to a sum rule, tan^2(theta_{solar}) ~ tan^2(theta_{solar,TBM}) - 1/2*theta_c*cos(beta), which is a consequence of the Georgi-Jarlskog relations in the quark sector. This deviation could account for the difference between the experimental best fit value for the solar mixing angle and the value predicted by the tri-bimaximal mixing matrix.

arXiv commentSubmitted for the SUSY07 proceedings, 4 pages, LaTeX

References in corpus (1)

• Group Theoretic Bases for Tribimaximal Mixing

Cited by in corpus (13)

• Golden Ratio Neutrino Mixing and $A_5$ Flavor Symmetry
• On the origin of neutrino flavour symmetry
• $A_4$ Family Symmetry from SU(5) SUSY GUTs in 6d
• Tri-bimaximal Neutrino Mixing and ${\theta }_{13}$
• A_4xSU(5) SUSY GUT of Flavour in 8d
• Measurable Neutrino Mass Scale in A4 x SU(5)
• On the Vanishing of the CP Asymmetry in Leptogenesis due to Form Dominance
• Vacuum misalignment corrections to tri-bimaximal mixing and form dominance
• A Note on Embedding Nonabelian Finite Flavor Groups in Continuous Groups
• Neutrino Mass and Flavour Models
• Geometrical Origin of CP Violation and CKM and MNS Matrices in SU(5) x T'
• Models and Phenomenology of Neutrino Masses circa 2010
• A Novel Origin of CP Violation