| Neutrino Mass, Mixing, and Flavor Change | p. 1 |
| Neutrino Masses and Mixing, and the Seesaw | p. 1 |
| What is a Majorana Neutrino? | p. 11 |
| Neutrino Flavor Change | p. 15 |
| Double Beta Decay | p. 21 |
| Conclusion | p. 23 |
| References | p. 23 |
| Laboratory Limits on Neutrino Masses | p. 25 |
| Introduction | p. 25 |
| Decay Kinematics of Weak Decays | p. 26 |
| m(¿¿) | p. 27 |
| m(¿¿) | p. 27 |
| m(¿e) | p. 28 |
| Search for Neutrinoless Double ß Decay | p. 41 |
| Double ß Decay | p. 42 |
| Double-ß-Decay Experiments | p. 45 |
| Summary and Outlook | p. 49 |
| Acknowledgments | p. 50 |
| References | p. 51 |
| Astrophysical and Cosmological Constraints on Neutrino Masses | p. 53 |
| Introduction | p. 53 |
| The Cosmological Relic Density of Stable Neutrinos | p. 54 |
| Neutrinos as Dark Matter | p. 57 |
| Neutrinos and Big Bang Nucleosynthesis | p. 59 |
| BBN Limits on Neutrino Masses and Lifetimes | p. 62 |
| BBN Limits on Neutrino Mixing Parameters | p. 64 |
| Neutrinos and Supernovae | p. 66 |
| Neutrinos and Cosmic Rays | p. 70 |
| Acknowledgments | p. 72 |
| References | p. 72 |
| Experimental Results on Neutrino Oscillations | p. 75 |
| Introduction | p. 75 |
| A Brief History of Neutrinos | p. 75 |
| Neutrino Sources | p. 77 |
| Neutrino Oscillations and Their Detection | p. 80 |
| Neutrino Oscillations | p. 80 |
| Matter Effects | p. 83 |
| Detection of Neutrino Oscillations | p. 84 |
| Solar Neutrino Experiments | p. 85 |
| Radiochemical Experiments | p. 87 |
| Real-Time Experiments | p. 88 |
| Discussion of Results | p. 94 |
| Atmospheric Neutrino Experiments | p. 97 |
| Main Experimental Results | p. 99 |
| Alternative Explanations | p. 102 |
| Reactor Experiments | p. 105 |
| Accelerator Experiments | p. 110 |
| LSND and KARMEN | p. 110 |
| CHORUS and NOMAD | p. 115 |
| Long-Baseline Experiments | p. 120 |
| Summary and Conclusions | p. 124 |
| Acknowledgments | p. 126 |
| References | p. 126 |
| Theoretical Interpretation of Current Neutrino Oscillation Data | p. 135 |
| Two-Neutrino Oscillations | p. 135 |
| Three-Neutrino Oscillations | p. 136 |
| 3 ¿ Mass Spectra | p. 137 |
| 3 ¿ Mixing | p. 138 |
| 3 ¿ Dynamics | p. 138 |
| Reactor Neutrinos in a 3 ¿ Interpretation | p. 139 |
| Atmospheric Neutrinos in a 3 ¿ Interpretation | p. 141 |
| Parameter Space | p. 141 |
| Data | p. 142 |
| Graphical Representations | p. 143 |
| Constraints on 3 ¿ Parameters | p. 144 |
| 2 ¿ Subcase: Impact of the First K2K Data | p. 149 |
| Solar Neutrinos in a 3 ¿ Interpretation | p. 151 |
| 2 ¿ Analysis (¿ = 0) | p. 151 |
| 3 ¿ Analysis (¿ ≠ 0, Within CHOOZ Limits) | p. 153 |
| 3 ¿ Analysis (¿ Unconstrained) | p. 154 |
| Summary of 3 ¿ Mixing | p. 154 |
| Four-Neutrino Oscillations in ""2+2"" Scenarios | p. 155 |
| 4 ¿ Mass Spectrum, Mixing, and Dynamics | p. 155 |
| Atmospheric Neutrinos | p. 157 |
| Solar Neutrinos | p. 158 |
| Global ""2+2"" Interpretation | p. 159 |
| Comments on ""3+1"" Mass Spectra | p. 161 |
| Addendum: Impact of the Very Latest Neutrino Data | p. 161 |
| Impact of New Solar Neutrino Data | p. 161 |
| Impact of New Atmospheric and Accelerator Data | p. 162 |
| General Summary | p. 163 |
| References | p. 163 |
| Theoretical Models of Neutrino Masses and Mixings | p. 169 |
| Introduction | p. 169 |
| Neutrino Masses and Lepton Number Nonconservation | p. 170 |
| Baryogenesis via Leptogenesis from Heavy- ¿c Decay | p. 172 |
| Models with Four (or More) Neutrinos | p. 174 |
| Three-Neutrino Models | p. 176 |
| Degenerate Neutrinos | p. 178 |
| Inverted Hierarchy | p. 182 |
| Normal Hierarchy | p. 184 |
| Summary | p. 188 |
| Importance of Neutrinoless Double Beta Decay | p. 189 |
| Expectations for ¿13 | p. 190 |
| Grand Unified Models of Fermion Masses | p. 191 |
| Models Based on Horizontal Abelian Charges | p. 192 |
| GUT Models Based on SO(10) | p. 197 |
| Conclusion | p. 198 |
| Acknowledgments | p. 201 |
| References | p. 201 |
| The Physics Potential of Future Long-Baseline Neutrino Oscillation Experiments | p. 209 |
| Introduction | p. 209 |
| Beams and Detectors | p. 210 |
| The Oscillation Framework | p. 214 |
| Correlations and Degeneracies | p. 220 |
| Event Rates | p. 222 |
| The LBL Setups Considered | p. 224 |
| The Qualitative Picture | p. 228 |
| The Analysis | p. 230 |
| Results | p. 232 |
| Conclusions | p. 237 |
| Acknowledgements | p. 238 |
| References | p. 238 |
| Index | p. 243 |
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