Introduction

Abstract

In the first part of this chapter, a short introduction to the study of neutrino oscillation is given. The importance of neutrino oscillation research is discussed; in contrast to other particle mixings and oscillations which have contributedmuch to the establishment of the standardmodel, the neutrino oscillation probes unprecedentedly low mass scales and has not been integrated into the standard model. The latter part of this chapter gives a brief history of neutrino oscillation studies from the prediction of the neutrino by Pauli to the discovery of the third mixing angle θ13.We will see the timeline of how current knowledge of neutrino oscillation was obtained and envisage future possibilities.