期刊
PHYSICS LETTERS B
卷 642, 期 5-6, 页码 503-509出版社
ELSEVIER
DOI: 10.1016/j.physletb.2006.09.061
关键词
neutrino mass; R-parity violation; NMSSM
In the Minimal Supersymmetric Standard Model with bilinear R-parity violation, only one neutrino eigenstate acquires a mass at tree level, consequently experimental data on neutrinos cannot be accommodated at tree level. We show that in the next-to-minimal extension, where a gauge singlet superfield is added to primarily address the so-called mu-problem, it is possible to generate two massive neutrino states at tree level. Hence, the global three-flavour neutrino data can be reproduced at tree level, without appealing to loop dynamics which is vulnerable to model-dependent uncertainties. We give analytical expressions for the neutrino mass eigenvalues and present examples of realistic parameter choices. (c) 2006 Elsevier B.V. All rights reserved.
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