1. Spin. Basic notions and relations. 1.1. Relativistic invariance and notion of spin. 1.2. Dirac equation. 1.3. Helicity basis and the amplitudes. 1.4. Space-reflection and time-reversal transformations. 1.5. Partial wave amplitudes. 1.6. Unitarity. 1.7. Crossing symmetry. 1.8. Spin observables. 1.9. Spin density matrix. 1.10. Bounds for the observables -- 2. Survey of the experimental data. 2.1. Spin effects in elastic scattering. 2.2. Spin effects in binary reactions. 2.3. Spin phenomena in inclusive production -- 3. Spin effects at fixed t. 3.1. The Regge poles and spin phenomena. 3.2. The absorption models. 3.3. The pomeron helicity flip. 3.4. Unitarity and the generalized reaction matrix. 3.5. The U-matrix method (fixed t region). 3.6. Geometrical models. 3.7. Relations between helicity amplitudes -- 4. Quantum chromodynamics and spin. 4.1. QCD Lagrangian. 4.2. Asymptotic freedom and confinement. 4.3. The chiral properties and helicity conservation. 4.4. The parton picture. 4.5. Factorization theorems. 4.6. Exclusive processes in QCD. 4.7. Inclusive processes in QCD -- 5. Models for exclusive processes. 5.1. QCD-inspired models. 5.2. Quantum geometrodynamics. 5.3. Chiral dynamics and hadron scattering -- 6. Models for the spin effects in inclusive reactions. 6.1. Regge model for inclusive processes. 6.2. Polarization and final state interaction. 6.3. SU(6)-symmetry and hyperon polarization. 6.4. Semiclassical models for hyperon polarization. 6.5. One-spin asymmetries in the central region -- 7. Spin structure of hadrons. 7.1. Baryon magnetic moments. 7.2. Deep inelastic scattering with polarized particles. 7.3. Structure function g[symbol] and proton helicity. 7.4. Nonperturbative models for the spin structure. 7.5. On the parton interpretation of g[symbol]. 7.6. Evolution of spin densities with Q[symbol]. 7.7. Gluon polarization density models. 7.8. Transverse spin densities -- 8. Future perspectives of spin studies. 8.1. Spin phenomena and electroweak interactions. 8.2. Search for new particles and spin effects. 8.3. Spin effects in e+e- -collisions. 8.4. Spin studies and tests of QCD. 8.5. Studies of nucleon spin structure.
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In recent years, there has been considerable growth in research activities related to spin phenomena in high energy physics and their theoretical interpretations. It has become clear that the spin enigma is not to be considered separately but that it is strongly related to the quark-gluon structure of hadrons and their interaction dynamics. Research on spin phenomena has now attracted a significant following of experimental and theoretical physicists who meet regularly at symposiums on the topic. This book serves as an introduction to the spin puzzles at high energies. Its main focus is on spin effects in hadronic processes and the spin structure of nucleons. The volume will be very useful for graduate students and for those working in the field of polarization physics or interested in the various aspects of strong interaction dynamics. The only book on spin phenomena in high energy physics, it fulfills the great need for an introductory volume in this area of growing interest.