Neutrino anomalies in gauge mediated model with trilinear R violation
Jul, 2001
26 pages
Published in:
- Phys.Rev.D 65 (2002) 053018
e-Print:
- hep-ph/0107204 [hep-ph]
Report number:
- TIFR-TH-01-26
View in:
Citations per year
Abstract:
The structure of neutrino masses and mixing resulting from trilinear violating interactions is studied in the presence of the gauge mediated supersymmetry breaking. Neutrino masses arise in this model at tree level through the RG-induced vacuum expectation values of the sneutrinos and also through direct contribution at 1-loop. The relative importance of these contributions is determined by the values of the strong and weak coupling constants. In case of purely couplings, the tree contribution dominates over the 1-loop diagram. In this case, one simultaneously obtains atmospheric neutrino oscillations and quasi-vacuum oscillations of the solar neutrinos if all the \l' couplings are assumed to be of similar magnitudes. If R parity violation arises from the trilinear \l couplings, then the loop induced contribution dominates over the tree level. One cannot simultaneously explain the solar and atmospheric deficit in this case if all the \l couplings are of similar magnitude. This however becomes possible with hierarchical \l and we give a specific example of this.- 14.60.Pq
- 12.60.Jv
- supersymmetry: symmetry breaking
- coupling: gauge
- R parity: violation
- neutrino: mass
- neutrino: mass ratio
- neutrino: mixing angle
- neutrino: oscillation
- neutrino: cosmic radiation
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