A NJL-based study of the QCD critical line

Aug, 2005
17 pages
Published in:
  • Phys.Rev.D 72 (2005) 056002
e-Print:
Report number:
  • FIRENZE-DFF-427-07-2005

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Abstract:
We employ a 3 flavor NJL model to stress some general remarks about the QCD critical line. The dependence of the critical curve on μq=(μu+μd)/2\mu_q=(\mu_u+\mu_d)/2 and μI=(μuμd)/2\mu_I=(\mu_u-\mu_d)/2 is discussed. The quark masses are varied to confirm that, in agreement with universality arguments, the order of transition depends on the number of active flavors NfN_f. The slope of the critical curve vs. chemical potential is studied as a function of NfN_f. We compare our results with those recently obtained in lattice simulations to establish a comparison among different models.
  • 25.75.Nq
  • 12.38.-t
  • 11.10.Wx
  • quantum chromodynamics
  • critical phenomena
  • Jona-Lasinio-Nambu model
  • flavor: 3
  • quark: mass
  • potential: chemical
  • quark: condensation