Quark and Lepton Flavor Mixings in the SU(5) Grand Unification Theory

Details Quark and Lepton Flavor Mixings in the SU(5) Grand Unification Theory Quark and Lepton Flavor Mixings in the SU(5) Grand Unification Theory

1998-11-27

arxiv.org/abs/hep-ph/9811495v1

Nucl.Phys.B548:60-86,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, no figure

Scientific paper

10.1016/S0550-3213(99)00049-8

We explain the imbalance of the flavor mixing angles between the quark and the lepton sectors in the context of the SU(5) GUT with the see-saw mechanism. The quark masses and the CKM matrix elements are obtained by using, respectively, the Fritzsch and Branco - Silva-Marcos form for the up- and down-quark Yukawa matrices (y^u and y^d) at the GUT scale. The charged-lepton Yukawa matrix (y^e) is the transpose of y^d, modified by the Georgi-Jarlskog factor. We show that the neutrino masses and mixing angles suggested by the recent solar and atmospheric neutrinos are then obtained from a simple texture of the neutrino Yukawa matrix (y^\nu) and a diagonal right-handed Majorana mass matrix at the GUT scale.

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