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

被引：5

作者：

Maslov, K. ^{[1
,2
]}

Blaschke, D. ^{[2
,3
,4
]}

机构：

[1] AKFA Univ, Milliy bog St 264, Tashkent 111221, Uzbekistan

[2] Univ Wroclaw, Inst Theoret Phys, Max Born Pl 9, PL-50204 Wroclaw, Poland

[3] Ctr Adv Syst Understanding CASUS, Untermarkt 20, D-02826 Gorlitz, Germany

[4] Helmholtzzentrum Dresden Rossendorf HZDR, Bautzener Landstr 400, D-01328 Dresden, Germany

来源：

PHYSICAL REVIEW D | 2023年 / 107卷 / 09期

关键词：

CHIRAL-SYMMETRY RESTORATION; HADRON PHASE-TRANSITION; BETH-UHLENBECK APPROACH; QUARK CONDENSATE; NJL-MODEL; QCD; THERMODYNAMICS; DECONFINEMENT; EXPANSION; CROSSOVER;

D O I：

10.1103/PhysRevD.107.094010

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the meson contribution to the equation of state of the 2-flavor Polyakov-loop Nambu- Jona-Lasinio 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 or2 - q2 < 0, i.e., the Landau damping, leads to an increase of the pressure for temperatures & GSIM;0.8T & chi;c and a significant meson momentum cutoff 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 T0. 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.

引用

页数：14

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