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Hadronic physics

Code: 205089
ECTS: 0.0
Lecturers in charge: prof. dr. sc. Dubravko Klabučar - Lectures
Lecturers: Dubravko Klabučar - Exercises
Take exam: Studomat

1. komponenta

Lecture typeTotal
Lectures 15
Exercises 15
* Load is given in academic hour (1 academic hour = 45 minutes)
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 quark-parton 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 light-quark sector, mostly unknown interactions at low energies and the need for modeling.
6. Some phenomenological hadron models useful in the light-quark sector: constituent quark models, MIT bag model, topological and non-topological solitons of effective meson theories, Skyrmions as baryons in the chiral topological soliton model. Topological and non-topological hybrid models.
7. Chiral symmetry and its breaking: explicit breaking as opposed to spontaneous/dynamical breaking. Pion as a Goldstone boson, PCAC.
8. Sigma-models as examples of spontaneous breaking of chiral symmetry.
9. Nambu-Jona-Lasinio (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 Dyson-Schwinger (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 Bethe-Salpeter equation for quark bound states. The resolution of the dichotomy "a quark-antiquark bound state or a Goldstone boson" for pseudoscalar mesons.
12. DS description of pseudoscalar, scalar, vector and axial mesons as quark-antiquark 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 quark-antiquark bound states.
14. Various selected topics.
15. Some insights on topics related to hot hadron/QCD matter.
  1. C. Cloet and C. D. Roberts, Explanation and Prediction of Observables using Continuum Strong QCD, Prog. Part. Nucl. Phys. 77 (2014) 1-69.
  2. U. Mosel, Fields, Symmetries and Quarks, Springer-Verlag.
  3. A. Holl, C. D. Roberts and S. V. Wright, Hadron physics and Dyson-Schwinger equations, e-Print Archive: nucl-th/0601071..
  4. Aktualno izdanje "Review of Particle Physics", Particle Data Group [trenutno K.A. Olive et al., Chin. Phys. C, 38, 090001 (2014).],
1. semester
Fizika elementarnih čestica - Izborni predmeti - Mandatory smjer - Elementary particle physics
Consultations schedule: