Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-08-13
Nucl.Phys. B585 (2000) 45-78
Physics
High Energy Physics
High Energy Physics - Phenomenology
35 pages, 25 PS figures, REVTeX, revised version to appear in Nuclear physics B
Scientific paper
10.1016/S0550-3213(00)00397-7
We consider a general symmetric $(3\times 3)$ mass matrix for three generations of neutrinos. Imposing the constraints, from the atmospheric neutrino and solar neutrino anomalies as well as from the CHOOZ experiment, on the mass squared differences and on the mixing angles, we identify the ranges of allowed inputs for the 6 matrix elements. We apply our results to Majorana left-handed neutrino masses generated at tree level and through fermion--sfermion loop diagrams in the MSSM with R-parity violation. The present experimental results on neutrinos from laboratories, cosmology and astrophysics are implemented to either put bounds on trilinear ($\lambda_{ijk}, \lambda'_{ijk}$) and bilinear ($\mu_{e,\mu,\tau}$) R-parity-violating couplings or constrain combinations of products of these couplings.
Abada Abdellatif
Losada Marta
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