Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-08-06
Phys.Lett. B360 (1995) 41-46
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, LATeX file, 4 figures available upon request
Scientific paper
10.1016/0370-2693(95)01107-2
In the minimal supersymmetric standard model, we have studied the evolution of the neutrino flavor mixing by using the renormalization group equation(RGE) with the Georgi-Jarlskog texture for the Yukawa coupling matrices.For the large Yukawa coupling of the charged lepton, i.e.,$\tan\b \gg 1$, the neutrino flavor mixing increases significantly with running down to the electroweak scale by the RGE. If one wishes to get the large neutrino flavor mixing $\sin \th_{23}$ at the electroweak scale, which is suggested by the muon neutrino deficit in the atomospheric neutrino flux, the initial condition $\sin \th_{23}\geq 0.27$ is required at the GUT scale. Combined with the see-saw enhancement of the neutrino flavor mixing, the large mixing is naturally reproduced by setting the reasonable initial condition.
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