This book provides a comprehensive overview of our present understanding of neutrino mass in unified gauge theories, its phenomenological and cosmological implications. It is divided into four parts. The first part presents a model independent discussion of the properties of the neutrino and nature of the neutrino masses. Part 2 deals with neutrino masses in unified and grand unified theories. In Part 3, phenomenological implications of neutrino mass is discussed. This includes neutrino oscillations, neutrinoless double beta decay and electromagnetic properties of neutrinos. Part 4 considers the solar neutrino puzzle, SN1987A and cosmological constraints on the neutrino properties. The book is meant for beginning and advanced graduate students in particle physics as well as active researchers in the field. It contains an extensive list of references to the original literature.

Contents:

• Part I:
• Introduction
• The Standard Model and the Neutrino
• Massive Neutrinos
• Dirac vs. Majorana Masses
• Part II:
• Neutrino Mass in SU(2)_L ´ U(1)_Y Models
• Neutrino Mass in Left-Right Symmetric Models
• Neutrino Mass in Grand Unified Models
• Part III:
• Kinematic Tests of the Neutrino Mass
• Neutrino Oscillations
• Electromagnetic Properties of Neutrinos
• Double Beta Decay
• Part IV:
• Related Processes
• Solar Neutrinos
• Neutrinos from Supernovae
• Neutrino Cosmology

"The book constitutes both an excellent introduction for postgraduate students who possess at least a basic understanding of the standard model of particle physics and a useful reference text for more advanced research workers in elementary particle theory. It is strongly recommended to all who are interested in this fascinating and rapidly developing field of physics."