The Minimal Extension of the SM and the Neutrino Oscillation Data

Details The Minimal Extension of the SM and the Neutrino Oscillation Data The Minimal Extension of the SM and the Neutrino Oscillation Data

1999-10-25

arxiv.org/abs/hep-ph/9910472v1

Acta Phys.Polon.B30:3139-3147,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, Presented by J. Gluza at the XXIII School of Theoretical Physics, Ustron'99, Poland, September 15-22, 1999

Scientific paper

We study the simplest Standard Model estension with only one extra right-handed neutrino. In this case there are two massless $m_{1,2}$ and two massive $m_{3,4}$ neutrinos, and in principle both solar and atmospheric anomalies can be described in two different scenarios, $m_3 << m_4$ (scheme I) and $m_3 \simeq m_4$ (scheme II). However, neither bi-maximal mixing nor the dark matter problem are explained in this minimal extension. Only scheme II can accommodate simultaneously maximal mixing for atmospheric neutrinos and the small mixing angle MSW solution for the solar anomaly. This scenario can be tested in the BOREXINO experiment.

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