Effective hadron theory of QCD
1994120 pages
Published in:
- Prog.Part.Nucl.Phys. 33 (1994) 1-120
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Abstract: (Elsevier)
We review present path-integral attempts to derive effective meson-baryon Lagrangians out of QCD or QCD-motivated quark models. There exist two different approaches to the solution of this problem for mesons. In the first case mesons are treated as composite quark-antiquark objects, whereas in the second case they are introduced as chiral phase of quark fields and external sources in the QCD Lagrangian. Our main attention is devoted to a discussion of the more dynamical first approach. This includes the hadronization of the Nambu-Jona-Lasinio model and various physical applications of the resulting effective Lagrangian concerning strong, electromagnetic and weak interactions of mesons. There emerge basically two principally different types of effective hadron theories reflecting the alternative (but at the same time dual) pictures of baryons: baryons as chiral (topological) solitons of the meson fields and as bound states of quarks and diquarks. It is demonstrated that these two pictures describe only two sides of the same medal.- review
- meson: field theory
- baryon: field theory
- effective Lagrangian
- strong interaction
- electroweak interaction
- quantum chromodynamics
- bosonization
- path integral
- Jona-Lasinio-Nambu model
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