Recent Results on Neutrino Oscillations

This article reviews the many new results from neutrino oscillation searches which were presented at ICHEP '98. Exciting indications of neutrino oscillations have been seen in the solar neutrino deficit, atmospheric neutrino deficit and LSND excess. These indications and reported limits on oscillations are considered. Attempts to develop a theory which addresses all of the neutrino oscillation data are discussed. Some of the remaining questions and the future experiments which will help answer these questions are described. This article reviews recent data on neutrino oscillations , focussing on the new results presented in Parallel Session 2 of the International Conference on High Energy Phyics (ICHEP) '98. Section 1 provides an introduction to the formalism of neutrino oscillations and practical-ities of understanding oscillation results. Section 2 reviews the present evidence for neutrino oscillations: the solar neutrino deficit, atmospheric neutrino deficit and LSND excess. Several recent experiments have completed extensive searches for oscillations and have established limits on oscillation parameters based on their null results. These are reviewed in section 3. Combining the positive indications and the limits permits construction of models for oscillations. Two types of models are considered in section 4. After considering all of the results, it is clear that the present data raise many questions. Some of the future experiments which may help resolve these questions are described in section 5.