"Hot and dense QCD : lattice results confront analytic calculations"
Relatore: Dr.ssa Maria Paola Lombardo- LNF INFN, Frascati
Note: SEMINARIO RINVIATO A DATA DA DESTINARSI
26 Ottobre 2004 ore 14.30
|We review the imaginary chemical potential approach to QCD
thermodynamics, and discuss lattice results on four flavor
QCD at nonzero temperature and baryon density. We exploit
analytic continuation either from imaginary to real
chemical potential, and from real to imaginary
chemical potential. The result compare well with the hadron
resonance gas model up to T ~ 0.95 T_c, and
approach a free field behaviour with a reduced effective
number of flavor for T >= 1.5 T_c; chiral symmetry
and confinement are interrelated, and we note analogies
between the critical line of QCD and that of simple models
with the same global symmetries.