6533b835fe1ef96bd12a00aa
RESEARCH PRODUCT
Matter Effects in Neutrino Propagation
Jose W.f. Vallesubject
PhysicsParticle physicsSolar neutrinoHigh Energy Physics::PhenomenologyUnparticle physicsSolar neutrino problemMassless particleNuclear physicsMeasurements of neutrino speedHigh Energy Physics::ExperimentNeutrinoNeutrino oscillationParticle Physics - PhenomenologyMajorondescription
After briefly reviewing the Mikheyev-Smirnov-Wolfenstein effect, I present a particle physics model where the required small neutrino mass arises from spontaneous R parity violation in supergravity theories. It is related to measurable processes associated with the existence of the Majoron and of supersymmetric (SUSY) particles. Astrophysical and laboratory limits tend to exclude regions of oscillation parameters where the high energy neutrinos are adiabatically converted. This suggests the possibility of a large reduction in the pp and 7 Be neutrino flux even for a mildly reduced 8 B neutrino flux, thus stressing the importance of the gallium experiments. Finally I consider other types of matter effects, e.g. due to the neutral current (NC). As an example, I discuss the case of resonant oscillation of massless non-orthogonal neutrinos. While the new effect, per se cannot solve the solar neutrino puzzle it opens up a new, as yet unexplored realm of matter effects which could be probed in the laboratory.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1989-01-01 |