Quantum Chromodynamics Sum Rules
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Quantum Chromodynamics Sum Rules
This concise book provides the necessary background to allow interested readers to launch original research projects on the subject matter. Currently, this material is not available from one single source, and is either spread out over numerous journal publications, or covered in long and technical monographs. At the core of this book lies the sum rule approach to obtain analytic results in Quantum Chromodynamics (QCD), the current theory of strong interactions among quarks and gluons. This method fully complements Lattice QCD, the corresponding computational approach based on discretizing QCD on a space-time lattice. Applications include standard determinations of hadronic particle properties with extensions to finite temperature and density, and possibly involving the presence of extreme magnetic fields. The latter cases include stellar objects (e.g. neutron stars and magnetars) as well as high-energy proton–proton and heavy-ion collisions. Further topics concern the determination of the fundamental parameters of QCD, e.g. quark masses and the quark–gluon couplings, the hadronic contribution to the anomalous magnetic moment of the muon, and electromagnetic coupling at the the W-boson mass scale.
Quantum Chromodynamics
Author: Walter Greiner
language: en
Publisher: Springer Science & Business Media
Release Date: 2013-03-09
The theory of strong interactions, quantum chromodynamics (QCD), was for mulated 30 years ago and has since been a very active field of research. The underlying equations of motion for the gauge degrees of freedom are nonlin ear and minimally coupled to fermions with global and local SU(3) charges. This leads to spectacular problems compared with those of QED since the gauge bosons themselves interact with each other. On the other hand, it is exactly the self-interaction of the gluons which leads to asymptotic freedom and the pos sibility to calcuate quark-gluon interaction at small distances in the framework of perturbation theory. We discover one of the most complicated but most beau tiful gauge theories which poses extremely challenging problems on modem theoretical and experimental physics today. Quantum chromodynamics is the quantum field theory that allows us to cal culate the propagation and interaction of colored quarks and gluons at small distances. Today's experiments do not allow these colored objects to be detected directly; instead one deals with colorless hadrons: mesons and baryons seen far away from the actual interaction point. The hadronization itself is a complicated process and not yet understood from first principles. Therefore one may won der how the signature of quark and gluon interactions can be traced through the process of hadronization.
Hadron Form Factors
This book introduces the theory of hadron form factors in a consistent manner, deriving step-by-step the key equations, defining the form factors, explaining their symmetry relations and applying mathematical tools to describe their behaviour. It is an ideal guide for graduate students studying particle physics and researchers.