Model analysis of thermal UV-cutoff effects on the chiral critical surface at finite temperature and chemical potential

Abstract

We study the effects of temporal UV-cutoff on the chiral critical surface in hot and dense QCD using a chiral effective model. Recent lattice QCD simulations indicate that the curvature of the critical surface might change toward the direction in which the first order phase transition becomes stronger on increasing the number of lattice sites. To investigate this effect on the critical surface in an effective model approach, we use the Nambu-Jona-Lasinio model with finite Matsubara frequency summation. We find that qualitative feature of the critical surface does not alter appreciably as we decrease the summation number, which is unlike the case what is observed in the recent lattice QCD studies. This may either suggest the dependence of chemical potential on the coupling strength or due to some additional interacting terms such as vector interactions which could play an important role at finite density.

arXiv comment7 pages, 8 figures

References in corpus (20)

• QCD Phenomenology based on a Chiral Effective Lagrangian
• NJL-model analysis of dense quark matter
• The phase diagram of dense QCD
• Chiral effective model with the Polyakov loop
• Phases of QCD: lattice thermodynamics and a field theoretical model
• Critical point of QCD at finite T and μ, lattice results for physical quark masses
• On the Phase Diagram of QCD
• Color Superconductivity and Chiral Symmetry Restoration at Nonzero Baryon Density and Temperature
• Polyakov loop, diquarks and the two-flavour phase diagram
• Phase diagrams in the three-flavor Nambu--Jona-Lasinio model with the Polyakov loop
• Thermodynamics of Two Flavor QCD to Sixth Order in Quark Chemical Potential
• The Equation of State for Two Flavor QCD at Non-zero Chemical Potential
• Universality, the QCD critical/tricritical point and the quark number susceptibility
• The equation of state in lattice QCD: with physical quark masses towards the continuum limit
• The three-flavor chiral phase structure in hot and dense QCD matter
• The chiral critical point of Nf=3 QCD at finite density to the order (mu/T)^4
• The QCD critical end point in the PNJL model
• Status of Lattice Studies of the QCD Phase Diagram
• U_A(1) Anomaly in Hot and Dense QCD and the Critical Surface
• Model analysis on thermal UV-cutoff effects on the critical boundary in hot QCD

Cited by in corpus (1)

• Linear Sigma Model at Finite Temperature and Baryonic Chemical Potential Using the Midpoint Technique