Impact and Implication of Bi-Large Neutrino Mixings on GUTs

Details Impact and Implication of Bi-Large Neutrino Mixings on GUTs Impact and Implication of Bi-Large Neutrino Mixings on GUTs

2003-06-04

arxiv.org/abs/hep-ph/0306035v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, uses ws-procs9x6.cls, talk at NOON03 (Kanazawa, Feb. 2003)

Scientific paper

Under the assumptions that 1) the quark/lepton mass matrices take Froggatt-Nielsen's factorized power form \lambda^{\psi_i+\psi_j} with anomalous U(1) charges \psi_i, and 2) the U(1) charges \psi_i respect the SU(5) GUT structure, we show that the quark mass data necessarily implies the large 2-3 mixing in the MNS mixing matrix U_{MNS}. If we further add the data of the mass squared difference ratio of solar and atmospheric neutrinos, then, it implies that the 1-2 mixing in U_{MNS} is also large, so explaining the bi-large mixing. This analysis also gives a prediction that U_{e3}\equiv(U_{\rm MNS})_{13} should be of order \lambda \sim (0.1 - 0.5).

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