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arXiv · hep-ph/0511327

Inverted neutrino mass hierarchies from U(1) symmetries

G. K. Leontaris·A. Psallidas·N. D. Vlachos
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Abstract

Motivated by effective low energy models of string origin, we discuss the neutrino masses and mixing within the context of the Minimal Supersymmetric Standard Model supplemented by a U(1) anomalous family symmetry and additional Higgs singlet fields charged under this extra U(1). In particular, we interpret the solar and atmospheric neutrino data assuming that there are only three left-handed neutrinos which acquire Majorana masses via a lepton number violating dimension-five operator. We derive the general form of the charged lepton and neutrino mass matrices when two different pairs of singlet Higgs fields develop non--zero vacuum expectation values and show how the resulting neutrino textures are related to approximate lepton flavor symmetries. We perform a numerical analysis for one particular case and obtain solutions for masses and mixing angles, consistent with experimental data.

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G. K. Leontaris, A. Psallidas, N. D. Vlachos. 2005-11-29. Inverted neutrino mass hierarchies from U(1) symmetries. https://doi.org/10.1142/s0217751x06033921

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