We discuss QCD at T ≃ 1.1Tc, where nonperturbative phenomena play an important role. We probe the system with an imaginary chemical potential, which gives the possibility to check directly the consistence of various phenomenological models by analytically continuing from real to imaginary μ. We found that for μI/T>0.1 Taylor expansions and simple models do not provide a good description of the number density and the quark number susceptibility, which are instead consistent with a critical behavior associated with the transition line in the negative μ2 half‐plane. We discuss the implications of our findings by analytically continuing our results to real chemical potential.
Imaginary chemical potential as a probe of the Quark Gluon Plasma close to Tc
D'ELIA, MASSIMO;
2007-01-01
Abstract
We discuss QCD at T ≃ 1.1Tc, where nonperturbative phenomena play an important role. We probe the system with an imaginary chemical potential, which gives the possibility to check directly the consistence of various phenomenological models by analytically continuing from real to imaginary μ. We found that for μI/T>0.1 Taylor expansions and simple models do not provide a good description of the number density and the quark number susceptibility, which are instead consistent with a critical behavior associated with the transition line in the negative μ2 half‐plane. We discuss the implications of our findings by analytically continuing our results to real chemical potential.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
