Quark Confinement And The Hadron Spectrum Iv Vienna Austria 3 8 July 2000

Summarizes the state of the art in this area of research.

Quantum chromodynamics is generally accepted to be the quantum field theory which describes the strong interactions in elementary particle physics. However, the question of the mechanism responsible for the “confinement” of the color degrees of freedom of quarks and gluons into hadrons still ranks as one of the most interesting open problems in physics. This proceedings volume summarizes the state of the art in this area of research. Mathematically inclined readers will find the articles based on monopoles, vortices, and topology most interesting. Meanwhile, lattice calculations can be performed for many important physical quantities. Their results can be used as guidelines for developing models of quark confinement. These models are indispensable for theoretical physicists performing calculations with the Bethe–Salpeter equation, Dyson–Schwinger equations, effective Hamiltonians, and potential models. The cross-fertilization of all these subfields of research becomes evident from the articles in this book. A few experimental papers are also included. Contents:Contemporary Applications of Dyson–Schwinger Equations (M B Hecht et al.)Strangeness Production Using Electrons (O K Baker)Glueballs, Hybrid and Exotic Mesons and String Breaking (C Michael)The Gluon Condensate from Gauge Invariant Vortex Vacuum Texture (K Langfeld)Quark Confinement in the Analytic Approach to QCD (A V Nesterenko)Confinement Picture in Dual Formulation of Lattice Gauge Models (O Borisenko & M Faber)Hamiltonian Lattice Gauge Theory (N E Ligterink)Electromagnetic Properties of Light Nucleon Resonances in a Chiral Constituent Quark Model (R F Wagenbrunn et al.)Relationship of Pionium Lifetime with Pion Scattering Lengths in Generalized Chiral Perturbation Theory (H Sazdjian)The Mass of the b Quark from Lattice NRQCD (S Collins)Weak Form Factors for Heavy Meson Decays (D Melikhov & B Stech)Instantaneous Bethe-Salpeter Equation: (Semi-) Analytical Solution (W Lucha et al.)QCD Sum Rules at Finite Temperature and Density (S Mallik)Mass of the Bottom Quark (W Lucha & F F Schöberl)and other papers Readership: Researchers, academics and graduate students in high energy physics. Keywords:

This book provides an update on our understanding of strong interaction, with theoretical and experimental highlights included. It is divided into five sections. The first section is devoted to the investigations into and the latest results on the mechanism of quark confinement. The second and third sections focus respectively on light and heavy quarks (effective field theories, Schwinger-Dyson approach and lattice QCD results). The fourth section deals with the deconfinement mechanism and quark-gluon plasma formation signals. The last section presents highlights of experiments, new physics beyond QCD, and nonperturbative approaches in other theories (strings and SUSY) that may be useful in QCD.

This book provides an update on our understanding of strong interaction, with theoretical and experimental highlights included. It is divided into five sections. The first section is devoted to the investigations into and the latest results on the mechanism of quark confinement. The second and third sections focus respectively on light and heavy quarks (effective field theories, Schwinger–Dyson approach and lattice QCD results). The fourth section deals with the deconfinement mechanism and quark–gluon plasma formation signals. The last section presents highlights of experiments, new physics beyond QCD, and nonperturbative approaches in other theories (strings and SUSY) that may be useful in QCD. Contents:Vortices, Confinement and Higgs Fields (R Bertle & M Faber)Hadronic Signature of Quark–Gluon Plasma (J Rafelski & J Letessier)Topology of Center Vortices (H Reinhardt)The Nonperturbative Quark-Gluon Vertex (J Skullerud et al.)Equivalence in Minkowski and Euclidean Field Theories (K M Maung et al.)Criterium for the Index Theorem on the Lattice (P Bicudo)Isospin Breaking in the Goldberger–Treiman Discrepancies (J L Goity & J Saez)Quantum Field Theory Approach to the Vacuum Replica in QCD (A V Nefediev & J E F T Ribeiro)Charm and Bottom Quark Masses from QCD Moment Sum Rules (M Eidemüller)Dilepton Production in Heavy-Ion Collisions: A Probe of Deconfinement (E Scomparin)Deuteron Photodisintegration at High Energy (F Ronchetti)Semianalytical Bounds on Spinless–Salpeter Energy Levels (R L Hall et al.)String Breaking and Monopoles in the 3D Abelian Higgs Model (M N Chernodub et al.)and other papers Readership: Researchers in high-energy, particle, theoretical, accelerator and experimental physics. Keywords:Gauge Field Theories;Models beyond the Standard Model;Chiral Symmetries;Perturbative and Nonperturbative QCD;Deconfinement;Hadrons

The 20-year-old problem of the confinement and the resulting spectrum of the bound states is central to quantum chromodynamics (QCD). Many approaches have been tried starting from different points of view: the potential theory, the Bethe-Salpeter equation, string and flux tube models, bag models, vacuum structure, current algebra, lattice theory, and numerical simulations. Phenomenological assumptions and first-principle theoretical results or indications have been combined. Many partial successes have been attained, but a unified and comprehensive treatment is still lacking.In recent years, new attention has been given to the problem, both in terms of theoretical developments and for the purpose of evaluating the spectrum and other properties of the particles. In particular, attention has been focussed on areas like numerical simulations, the derivation of the potential, the use of the Bethe-Salpeter equation, the connection between the potential and the chiral symmetry approach.This workshop was an opportunity for a synthesis and a comparison of the different points of view.

A comprehensive and up-to-date overview of soft and hard diffraction processes in strong interaction physics. The first part covers soft hadron—hadron scattering in a complete and mature presentation. It can be used as a textbook in particle physics classes. Chapters 8-11 address graduate students as well as researchers, covering the "new diffraction": the pomeron in QCD, low-x physics, diffractive deep inelastic scattering and related processes.

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