Limits on ν µ → ν τ oscillations and tau neutrino magnetic moment from neutrino-electron scattering Abstract If the tau neutrino has large magnetic moment it might be effectively used to search for ν µ −ν τ neutrino oscillations in neutrino-electron scattering in beam dump experiments. Using the present experimental limits on the magnetic moments of tau and muon neutrinos, limit on the probabil...

It is shown that recent results from the Super-Kamiokande detector constrain the tau neutrino diagonal magnetic moment to µ ντ < 1.3 × 10 −7 µ B for the case of ν µ → ν τ interpretation of the atmospheric neutrino anomaly. It is pointed out that the large magnetic moment of the tau neutrino could affect further understanding of the origin of the anomaly. Recent results from the Super-Kamiokande...

Limits on ν µ → ν τ oscillations and tau neutrino magnetic moment from muon neutrino-electron scattering Abstract If the tau neutrino has large magnetic moment it might be effectively used to search for ν µ − ν τ neutrino oscillations in muon neutrino-electron scattering in beam dump experiments. Using the present experimental limits on the magnetic moments of tau and muon neutrinos as correspo...

I review some aspects concerning the physics of neutrino mixing and oscillations. I discuss in some detail the physical neutrino oscillations parameter space in the case of two and three family mixing, and briefly describe the current knowledge of neutrino mixing parameters according to the present solar, atmospheric, and reactor neutrino data. I also briefly comment on the possibility of solvi...

Two-neutrino oscillations in vacuum are studied as a possible solution of the solar neutrino problem. New constraints on the parameter sin 2θ, characterizing the mixing of the electron neutrino with another active or sterile neutrino, as well as on the mass–squared difference, ∆m2, of their massive neutrino components, are derived using the latest results from the four solar neutrino experiment...

The determination of neutrino flavor transition mechanism by neutrino telescopes is presented. We first propose a model-independent parametrization for flavor transitions (such as standard three-flavor oscillations, neutrino decays or others) of astrophysical neutrinos propagating from their sources to the Earth. We demonstrate how one can constrain parameters of the above parametrization by pe...

Neutrino decay in vacuum has often been considered as an alternative to neutrino oscillations. Because non-zero neutrino masses imply the possibility of both neutrino decay and neutrino oscillations, we present a model-independent formal treatment of these combined scenarios. For that, we show for the example of Majoron decay that in many cases decay products are observable and may even oscilla...

We give a review on a recently developed powerful method for investigation of different phenomena that can appear when neutrinos and electrons move in background matter with special focus on the spin phenomena. This paper is devoted to the problem of neutrino and electron motion in a dense matter with special focus on the spin phenomena. It has been proven in recent oscillation experiments that...

Using the Einstein-Cartan-Dirac theory, we study the effect of torsion on neutrino oscillation. We see that torsion cannot induce neutrino oscillation, but affects it whenever oscillation exists for other reasons. We show that the torsion effect on neutrino oscillation is as important as the neutrino mass effect, whenever the ratio of neutrino number density to neutrino energy is ∼ 10 cm−3 /eV,...

The present status of the problem of neutrino mass, mixing and neutrino oscillations is briefly summarized. The evidence for oscillations of atmospheric neutrinos found recently in the Super-Kamiokande experiment is discussed. Indications in favor of neutrino oscillations obtained in solar neutrino experiments and in the accelerator LSND experiment are also considered. Implications of existing ...