Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-06-16
Phys.Lett. B642 (2006) 503-509
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 2 figures; further clarifications added, to appear in PLB
Scientific paper
10.1016/j.physletb.2006.09.061
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.
Abada Asmaa
Bhattacharyya Gautam
Moreau Grégory
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