Old and New Problems in Elementary Particles

PrefazioneOn the Dirac Magnetic Poles 1. Introduction1 2. The Main Properties of Dirac Poles 2.1. The Spin, the Electric-dipole Moment and the Mass 2.2. Coupling Constant and Production Crosssection 2.3. Energy Losses by Ionization, Cerenkov Emission and Bremsstrahlung 2.4. The Scattering 2.5. The Binding 3. The Experimental Searches for Dirac Poles 3.1. Experiments with Accelerators 3.2. Experiments with Primary Cosmic Rays 4. A Few Remarks about Dirac's Monopole Theory 4.1. Properties of Symmetry of a Theory Which includes Magnetic Poles 4.2. A Few Comments on the First quantization Theory 4.3. A Few Remarks about Second QuantizationSpontaneous SU3 Breaking 1. Introduction 2. Spontaneous SU3 Breaking 3. Effects of Weak and Electromagnetic Interactions 4. Stability of Solutions 5. Summary and ConclusionsOn Supergain Antennae 1. Introduction 2. A General Theorem 3. Application of the General Theorem to Emission 4. Application of the General Theorem to Absorption 5. Antennae; the Reciprocity Theorem 6. The Principle of Indeterminacy 7. Transitions in Atoms and Nuclei 8. Practical PossibilitiesAspects of the Resonance-Particle-Pole Relationship Which May Be Useful in the Planning and Analysis of Experiments 1. Introduction 2. Certain Basic S-Matrix Concepts 3. The Breit-Wigner Extrapolation 4. Extrapolation to Poles on the Real Axis 5. General Problem of Extrapolation, Particle Multiplicity 6. Pole Locations and Particle Masses 7. Dynamical Equivalence of Different Pole Positions 8. ConclusionThe Relativistic Energy-Momentum Tensor of the Electromagnetic Field in MatterSum Rules for Photon ProcessesPropagation of Signals and ParticlesSome Recent Experiments at DESY Introduction 1. Photoproduction of Wide-Angle Electron-Positron Pairs at High Energies 2. Electromagnetic Form Factors of the Proton 3. Photoproduction 3.1. Total Cross-section of the Photoproduction of the Vector Mesons ¿, ¿ , f 3.2. Photoproduction of ¿°-mesons in the Coulomb Field of Heavy Nuclei and the ¿º-Lifetime 3.3. Photoproduction of Single p+-mesons between 1.2 and 3.0 GeV at Very Small AnglesFuture of Neutrino Physics with Large ChambersProspects for the Muon-Electron Problem 1. Introduction 2. Static Properties of the Leptons 2.1 Masses 2.2. Statistics 2.3. Magnetic Moments 3. High-Energy Electromagnetic Processes 3.1. Lepton-proton Scattering 3.2. Pair Production, Bremsstrahlung, Tridents 3.3. Clashing e+e- Beams 4. Weak Interactions 4.1. Muon Capture 4.2. Neutrino Interactions 4.3. Decay of Heavy Particles 4.4. Search for New Leptons 5. ConclusionsHadronic Contributions to the Photon Propagator 1. Introduction 2. A Theorem 3. Renormalization 4. An Alternative HypothesisTen Years of the Universal (V--A) Theory of Weak InteractionsThermodynamics in the Special and the General Theory of Relativity 1. Introduction 2. Relativistic Heat Engines 3. Thermodynamics in General RelativityResults and Programs in the Search for Fractionary Charges by the Magnetic Levitation Electrometer 1. Introduction 2. Possible Methods of Search for Quarks 3. The First Set of Measurements with the Magnetic Levitation Electrometer 4. Remarks on the Sensitivity In the First Set of Measurements 5. Moving Towards Bigger Grains 6. The Resonance Method 7. Final Remarks and a Few Comments on other Possible Applications of the MethodRemarks on Some Technical and Organizational Problems of Elementary-Particle PhysicsNeutrino Experiments and the Question of Leptonic-Charge Conservation 1. Selection Rules 2. Leptonic Charge Violation? 3.