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This book is devoted to the theory and phenomenology of transverse-spin effects in high-energy hadronic physics. Contrary to common past belief, it is now rather clear that such effects are far from irrelevant. A decade or so of intense theoretical work has shed much light on the subject and brought to surface an entire class of new phenomena, which now await thorough experimental investigation. Over the next few years a number of experiments world-wide (at BNL, CERN, DESY and JLAB) will run with transversely polarised beams and targets, providing data that will enrich our knowledge of the transverse-spin structure of hadrons. It is therefore timely to assess the state of the art, and this is the principal aim of the volume. An outline of the book is as follows. After a few introductory remarks (Chapter 1), attention is directed in Chapter 2 to transversely polarised deeply-inelastic scattering (DIS), which probes the transverse spin structure function g2. This existing data are reviewed and discussed (for completeness, a brief presentation of longitudinally polarised DIS is also provided). In Chapter 3 the transverse-spin structure of the proton is illustrated in detail, with emphasis on the transversity distribution and the twist-three parton distribution contributing to g2. Model calculations of these quantities are also presented. In Chapter 4, the QCD evolution of transversity is studied at leading and next-to-leading order. Chapter 5 illustrates the g2 structure function and its related sum rules within the framework of perturbative QCD. The last three chapters are devoted to the phenomenology of transversity, in the context of Drell-Yan processes (Chapter 6), inclusive leptoproduction (Chapter 7) and inclusive hadroproduction (Chapter 8). The interpretation of some recent single-spin asymmetry data is discussed and the prospects for future measurements are reviewed.

High spin physics. --- Nuclear spin. --- Hadrons. --- Strongly interacting particles --- Particles (Nuclear physics) --- Partons --- Spin, Nuclear --- Angular momentum (Nuclear physics) --- Nuclear physics --- High energy spin physics --- High spin nuclear levels --- High spin states (Physics)

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This book collects the Proceedings of the Workshop ``Incontri di Fisica delle Alte Energie (IFAE) 2006, Pavia, 19-21 April 2006". This is the fifth edition of a new series of meetings on fundamental research in particle physics and was attended by more than 150 researchers. Presentations, both theoretical and experimental, addressed the status of Standard Model and Flavour physics, Neutrino and Cosmological topics, new insights beyond the present understanding of particle physics and cross-fertilization in areas such as medicine, biology, technological spin-offs and computing. Special emphasis was given to the expectations of the forthcoming Large Hadron Collider, due in operation in 2007. The venue of plenary sessions interleaved with parallel ones allowed for a rich exchange of ideas, presented in these Proceedings, that form a coherent picture of the findings and of the open questions in this extremely challenging cultural field.

Particles (Nuclear physics) --- High spin physics --- Quantum field theory --- Cosmic rays --- High energy spin physics --- High spin nuclear levels --- High spin states (Physics) --- Nuclear physics --- Quantum theory. --- Nuclear physics. --- Particle acceleration. --- Particle and Nuclear Physics. --- Elementary Particles, Quantum Field Theory. --- Astrophysics and Astroparticles. --- Quantum Field Theories, String Theory. --- Nuclear Physics, Heavy Ions, Hadrons. --- Particle Acceleration and Detection, Beam Physics. --- Acceleration (Mechanics) --- Atomic nuclei --- Atoms, Nuclei of --- Nucleus of the atom --- Physics --- Quantum dynamics --- Quantum mechanics --- Quantum physics --- Mechanics --- Thermodynamics --- Acceleration --- Elementary particles (Physics). --- Quantum field theory. --- Astrophysics. --- String theory. --- Heavy ions. --- Ions --- Models, String --- String theory --- Nuclear reactions --- Astronomical physics --- Astronomy --- Cosmic physics --- Relativistic quantum field theory --- Field theory (Physics) --- Quantum theory --- Relativity (Physics) --- Elementary particles (Physics) --- High energy physics --- Nuclear particles --- Nucleons