Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-11-10
Phys.Rev.Lett.86:3488-3491,2001
Physics
High Energy Physics
High Energy Physics - Phenomenology
RevTex format, 2 figures, 4 pages, a few new references, no other important change, figures unchanged, version to be published
Scientific paper
10.1103/PhysRevLett.86.3488
Present neutrino data are consistent with neutrino masses arising from a common seed at some ``neutrino unification'' scale $M_X$. Such a simple theoretical ansatz naturally leads to quasi-degenerate neutrinos that could lie in the electron-volt range with neutrino mass splittings induced by renormalization effects associated with supersymmetric thresholds. In such a scheme the leptonic analogue of the Cabibbo angle $\theta_{\odot}$ describing solar neutrino oscillations is nearly maximal. Its exact value is correlated with the smallness of $\theta_{reactor}$. These features agree both with latest data on the solar neutrino spectra and with the reactor neutrino data. The two leading mass-eigenstate neutrinos present in \ne form a pseudo-Dirac neutrino, avoiding conflict with neutrinoless double beta decay.
Chankowski Piotr H.
Ioannisian Ara
Pokorski Stefan
Valle Jose W. F.
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