Effect of mesonic off-shell correlations in the PNJL equation of state

Abstract

We study the meson contribution to the equation of state of the 2-flavor PNJL model, including the full momentum dependence of the meson polarization loops. Within the Beth-Uhlenbeck approach, we demonstrate that the contribution from the quark-antiquark continuum excitations in the spacelike region ${\omega }^2-q^2<0$, i.e. the Landau damping, leads to an increase of the pressure for temperatures $\gtrsim 0.8T_c^{\chi }$ and a significant meson momentum cut-off dependence in the mesonic pressure and the QCD trace anomaly. We investigate the dependence of the results on the choice of the Polyakov-loop potential parameter $T_0$. From the dependence of the mesonic pressure on the current quark mass, by means of the Feynman-Hellmann theorem, we evaluate the contribution of the pion quasiparticle gas and Landau damping to the chiral condensate.

13 pages, 8 figures

References in corpus (11)

• The Phase Structure of the Polyakov--Quark-Meson Model
• Neutron matter at next-to-next-to-next-to-leading order in chiral effective field theory
• Mesonic correlation functions at finite temperature and density in the Nambu-Jona-Lasinio model with a Polyakov loop
• The chiral and deconfinement crossover transitions: PNJL model beyond mean field
• Improved Polyakov-loop potential for effective models from functional calculations
• Nonlocal SU(3) chiral quark models at finite temperature: the role of the Polyakov loop
• The Quark Propagator in the NJL Model in a self-consistent 1/Nc Expansion
• Polyakov-loop suppression of colored states in a quark-meson-diquark plasma
• Finite momentum meson correlation functions in a QCD plasma
• Spectral function of fermions in a highly occupied non-Abelian plasma
• Effects of the Regularization on the Restoration of Chiral and Axial Symmetries

Cited by in corpus (6)

• Asymptotically conformal CFL quark matter within a nonlocal chiral quark model
• Tripling Fluctuations and Peaked Sound Speed in Fermionic Matter
• Quarkyonic picture of isospin QCD
• Quark matter with an anisotropic momentum distribution
• Beth-Uhlenbeck equation for the thermodynamics of fluctuations in a generalised 2+1D Gross-Neveu model
• Generalized Beth-Uhlenbeck Approach to the 2+1D Gross-Neveu Model