Meson phenomenology and phase transitions in nonlocal chiral quark models

JUAN PABLO CARLOMAGNO; DANIEL GÓMEZ DUMM; NORBERTO N. SCOCCOLA

Ibarra

Workshop; CERN Latin American School of High-energy physics; 2015

CERN

When the temperature and/or density increase, one finds a transition from a hadronic phase to a partonic one, in which chiral symmetry is restored. From the theoretical point of view, one way to address the study of these phase transitions is through lattice QCD calculations. However, this ab-initio approach shows difficulties when dealing with small current quark masses and finite real chemical potentials. Thus it is worth to develop effective models that show consistency with lattice results, and can be extrapolated into regions not accessible by lattice calculation techniques. Here we will concentrate on nonlocal extensions of the Nambu Jona-Lasinio (NJL) model, in which quarks interact through covariant nonlocal chirally symmetric four-point couplings.