SU(2N_F) symmetry of QCD at high temperature and its implications

Abstract

If above a critical temperature not only the SU(N_F)_L \times SU(N_F)_R chiral symmetry of QCD but also the U(1)_A symmetry is restored, then the actual symmetry of the QCD correlation functions and observables is SU(2N_F). Such a symmetry prohibits existence of deconfined quarks and gluons. Hence QCD at high temperature is also in the confining regime and elementary objects are SU(2N_F) symmetric "hadrons" with not yet known properties.

Comments: 3 pp, presented at "Critical Point and Onset of Deconfinement", Wroclaw, May, 30 - June,4, 2016