SOME REMARKS ON νμ ⇆ νe OSCILLATIONS OF TERRESTRIAL NEUTRINOS AND ATMOSPHERIC NEUTRINO OSCILLATIONS

We present the results of an analysis of the data of reactor and accelerator neutrino oscillation experiments in the framework of a model with mixing of three massive neutrino fields and a neutrino mass hierarchy. The results of the LSND experiment are commented. Taking into account future long-baseline neutrino oscillation experiments, we have also analyzed the atmospheric neutrino data in the framework of the model. The problem of neutrino masses and mixing is the central issue in neutrino physics at present. It is generally believed that the experimental investigation of this problem could lead to a discovery of new physics beyond the standard model. We will discuss here some possibilities to reveal neutrino mixing in experiments with terrestrial neutrinos. In accordance with the hypothesis of neutrino mixing, the flavor neutrino fields νlL are linear combinations of the left-handed components of neutrino fields νiL with masses mi: νlL = ∑