Symmetries and symmetry breaking patterns in QCD: chiral and deconfinement transitions

Abstract

The symmetry breaking pattern of QCD features two seemingly disconnected phenomena: the spontaneous breakdown of the Z(3) center symmetry in the deconfinement transition of pure-gauge QCD, and the spontaneous breaking of chiral SU(N_f)xSU(N_f) symmetry in the limit of N_f massless quark flavours. The dynamical entanglement of these symmetries is displayed in the framework of a schematic model (the PNJL model) in comparison with results from Lattice QCD. Extensions to non-zero baryon chemical potential are discussed.

6 pages, 6 figures, to be publ. in Proc. 4th Int Symposium on Symmetries in Subatomic Physics (SSP2009), Taipei, Taiwan, June 2-5 2009

References in corpus (8)

• The QCD transition temperature: results with physical masses in the continuum limit
• The QCD Equation of State with almost Physical Quark Masses
• Polyakov loop, diquarks and the two-flavour phase diagram
• Phase diagrams in the three-flavor Nambu--Jona-Lasinio model with the Polyakov loop
• Dynamics and thermodynamics of a nonlocal Polyakov--Nambu--Jona-Lasinio model with running coupling
• Phase structure, collective modes, and the axial anomaly in dense QCD
• In-medium chiral condensate beyond linear density approximation
• Open charm production at high energies and the quark Reggeization hypothesis