This book aims to provide a survey of the current state of research in the physics of neutrinos, which has undergone dramatic development during the last decade, in a form accessible to the nonspecialist and the graduate stu dent. The major issue during the last two decades has been the neutrino mass, whereas the interaction of neutrinos was well understood within the framework of the standard theory, which was established in the 1970s. In 1994, we published a textbook-format review article "Physics 01Neutrinos' in "Physics and Astrophysics 01 Neutrinos," in anticipation that the mass of the...

Observations of neutrinos being emitted by the supernova SN1987A, star neutrinos, and atmospheric neutrinos by means of underground detectors have provided new insights into astronomy. These observations have brought to light new unresolved phenomena such as the solar neutrino problem, spurring investigative studies among particle physicists and astrophysicists. Today, intense interaction and continual cooperation between specialists in the field of particle physics and astronomy/cosmology are a pre-requisite for conducting further studies.
This book provides detailed elaborations on...