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

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.
9780735404809
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/117679
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact