Chiral transition and deconfinement in QCD

Abstract

The study of QCD with two light dynamical fermions is of fundamental importance to understand the mechanism of color confinement. We present results of a numerical investigation on the order of the chiral phase transition with $N_f=2$ by use of a novel strategy in finite size scaling analysis. We compare the critical behaviour of the specific heat, of the chiral susceptibility and of the equation of state with the possible critical behaviours. A second order transition in the O(4) and O(2) universality classes are excluded by our data and substantial evidence emerges for a first order transition. Like in most of previous works we have used the standard staggered action with $L_t=4$: possible scaling violations and the need for further studies are discussed.

arXiv comment6 pages, 9 figures, to appear in the proceedings of Computational Hadron Physics, Nicosia, 14-17 September 2005

References in corpus (7)

• Static and Dynamic Critical Phenomena at a Second Order QCD Phase Transition
• Susceptibilities, the Specific Heat and a Cumulant in Two-Flavour QCD
• Phase structure and critical temperature of two-flavor QCD with a renormalization group improved gauge action and clover improved Wilson quark action
• Scaling Study of the Two-Flavor Chiral Phase Transition with the Kogut-Susskind Quark Action in Lattice QCD
• Two flavor QCD and Confinement
• Scaling of Pseudo-Critical Couplings in Two-Flavour QCD
• Critical Behavior in Nt = 4 Staggered Fermion Thermodynamics

Cited by in corpus (2)

• Role of Glueballs in Non-Perturbative Quark-Gluon Plasma
• Ultra-light Glueballs in Quark-Gluon Plasma