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CKM and Tri-bimaximal MNS Matrices in a SU(5) x (d)T Model · Around

2007

CKM and Tri-bimaximal MNS Matrices in a SU(5) x (d)T Model

Chen, Mu-Chun, Mahanthappa, K. T.

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We propose 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 Z_{12} x Z'_{12} symmetry, which also forbids, up to some high orders, operators that lead to proton decay.

Built on

A. Aranda, C. D. Carone and R. F. Lebed, Phys. Lett. B474
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P. H. Frampton and T. W. Kephart, Int. J. Mod. Phys. A10
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E. Ma and G. Rajasekaran, Phys. Rev. D64
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Then

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