Bilarge neutrino mixing from supersymmetry with high-scale nonrenormalizable interactions

Details Bilarge neutrino mixing from supersymmetry with high-scale nonrenormalizable interactions Bilarge neutrino mixing from supersymmetry with high-scale nonrenormalizable interactions

2005-10-22

arxiv.org/abs/hep-ph/0510298v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 5 figures. Minor modifications are made in the title and the text, some new references are added. To appear in this

Scientific paper

10.1103/PhysRevD.73.035003

We suggest a supersymmetric (SUSY) explanation of neutrino masses and mixing, where nonrenormalizable interactions in the hidden sector generate lepton number violating Majorana mass terms for both right-chiral sneutrinos and neutrinos. It is found necessary to start with a superpotential including an array of gauge singlet chiral superfields. This leads to nondiagonal $\Delta L = 2$ mass terms and almost diagonal SUSY breaking $A$-terms. As a result, the observed pattern of bilarge mixing can be naturally explained by the simultaneous existence of the seesaw mechanism and radiatively induced masses. Allowed ranges of parameters in the gauge singlet sector are delineated, corresponding to each of the cases of normal hierarchy, inverted hierarchy and degenerate neutrinos.

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