The minimal extension of the SM and the neutrino oscillation data
Metadata
Show full item recordEditorial
Jagiellonian University
Materia
Reconciling dark-matter Right-handed neutrinos Scale double-beta Atmospheric neutrinos Sterile neutrino LSND experiment Mass hierarchy Lepton sector CP violation
Date
1999Referencia bibliográfica
Águila, F.; Gluza, J.; Zralek. The minimal extension of the SM and the neutrino oscillation data. Acta Physica Polonica B, 30(11): 3139-3147 (1999). [http://hdl.handle.net/10481/32417]
Sponsorship
Work supported in part by Polish Committee for Scientific Research under Grants n. 2P03B08414, 2P03B04215 and CICYT under contract AEN96-1672 and Junta de Andalucía, under contract FQM101.Abstract
We study the simplest Standard Model extension with only one extra right-handed neutrino. In this case there are two massless m1,2 and two massive m3,4 neutrinos, and in principle both solar and atmospheric anomalies can be described in two different scenarios, m3 ≪ m4 (scheme I) and m3 ≃ m4 (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.