Universal Seesaw Mass Matrix Model with Three Light Pseudo-Dirac Neutrinos

Details Universal Seesaw Mass Matrix Model with Three Light Pseudo-Dirac Neutrinos Universal Seesaw Mass Matrix Model with Three Light Pseudo-Dirac Neutrinos

1998-06-29

arxiv.org/abs/hep-ph/9806516v2

Phys.Rev. D59 (1999) 053004

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 20 pages

Scientific paper

10.1103/PhysRevD.59.053004

A universal seesaw mass matrix model, which gives successful description of quark mass matrix in terms of lepton masses, yields three "sterile" neutrinos \nu^s_{i}, which compose pseudo-Dirac neutrinos \nu_{i\pm}^{ps}\simeq (\nu_{i} \pm \nu^s_{i})/\sqrt{2} together with the active neutrinos \nu_{i} (i=e,\mu,\tau). The solar and atmospheric neutrino data are explained by the mixings \nu_{e}\leftrightarrow \nu^s_{e} and \nu_{\mu}\leftrightarrow \nu^s_{\mu}, respectively. In spite of such observations of the large mixing \sin^2 2\theta\simeq 1 in the disappearance experiments, effective mixing parameters \sin^2 2\theta^{\alpha\beta} in appearance experiments \nu_\alpha\to\nu_\beta (\alpha, \beta = e, \mu, \tau) are highly suppressed.

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