Load:

1. komponenta
Lecture type  Total 
Lectures 
15 
Exercises 
15 
* Load is given in academic hour (1 academic hour = 45 minutes)

Description:

The goal of the course is understanding of the quark substructure of hadrons and of their processes. The key experimental facts and their implications are especially stressed, as is the role of the basic principles of symmetries and of field theory.
The course content by specific topics:
1. Hadronic phenomenology: baryons, mesons. Hadron interactions by meson exchange. Conservation of isospin, strangeness, charm and baryon number.
2. Quantum numbers of quarks, SU(N) symmetries and representations: baryon and meson multiplets.
3. Brief history of the quarkparton concept. Scattering of leptons on nucleons (and production of hadrons through e+e annihilation) as proofs of quarks and gluons.
4. Basic concepts of gauge theories: brief comparison of quantum electrodynamics and quantum chromodynamics (QCD). Qualitative discussion of asymptotic freedom and confinement in QCD, nonperturbative QCD at low and intermediate energies.
5. Hadrons as quark and gluon composites. Heavy quarkonia as the simplest case. Characteristics of the lightquark sector, mostly unknown interactions at low energies and the need for modeling.
6. Some phenomenological hadron models useful in the lightquark sector: constituent quark models, MIT bag model, topological and nontopological solitons of effective meson theories, Skyrmions as baryons in the chiral topological soliton model. Topological and nontopological hybrid models.
7. Chiral symmetry and its breaking: explicit breaking as opposed to spontaneous/dynamical breaking. Pion as a Goldstone boson, PCAC.
8. Sigmamodels as examples of spontaneous breaking of chiral symmetry.
9. NambuJonaLasinio (NJL) model as a simple example of dynamical breaking of chiral symmetry, generating of quark condensates and constituent quark masses.
10. Extending NJL model to more realistic interactions through DysonSchwinger (DS) approach to quarks and hadrons. System of DS equations for Green's functions of quantum field theory.
11. DS equation for quark propagators and BetheSalpeter equation for quark bound states. The resolution of the dichotomy "a quarkantiquark bound state or a Goldstone boson" for pseudoscalar mesons.
12. DS description of pseudoscalar, scalar, vector and axial mesons as quarkantiquark bound states, from the light to the heavy quark sector. Models of quark interactions at low and intermediate energies. Connection with "ab initio" DS calculations.
13. Some processes with hadrons in DS approach. Resolution of problems with Abelian anomaly which otherwise plague descriptions of light pseudoscalars as quarkantiquark bound states.
14. Various selected topics.
15. Some insights on topics related to hot hadron/QCD matter.

Literature:

 C. Cloet and C. D. Roberts, Explanation and Prediction of Observables using Continuum Strong QCD, Prog. Part. Nucl. Phys. 77 (2014) 169.
 U. Mosel, Fields, Symmetries and Quarks, SpringerVerlag.
 A. Holl, C. D. Roberts and S. V. Wright, Hadron physics and DysonSchwinger equations, ePrint Archive: nuclth/0601071..
 Aktualno izdanje "Review of Particle Physics", Particle Data Group [trenutno K.A. Olive et al., Chin. Phys. C, 38, 090001 (2014).],
