Phase diagram in the entanglement PNJL model

15th International Conference on Strangeness in Quark Matter

Friesen, A.^1 ; Kalinovsky, Y.^2 ; Toneev, V.^1

Bogoliubov Laboratory for Theoretical Physics, JINR, Dubna, Russia^1

Laboratory for Information Technologies, JINR, Dubna, Russia^2

关键词: Baryon chemical potential;    Chiral phase transitions;    Critical end-point;    First order;    First order transitions;    Nambu-Jona-Lasinio model;    Qcd phase diagrams;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/668/1/012128/pdf
DOI  :  10.1088/1742-6596/668/1/012128

来源: IOP

【 摘 要 】

Effects of the vector interaction in the Nambu-Jona-Lasinio model with Polyakov loop are studied in combination with the entanglement interaction between the quark and pure gauge sectors. We investigate the QCD phase diagram and find that the first order chiral phase transition at finite baryon chemical potentials and its critical endpoint disappear for sufficiently large values of the vector interaction constant Gv. The presence of an entanglement interaction between quark and pure gauge sectors leads to an increase of the value Gvfor which the first order transition disappears. The influence of a nonzero Gvon the curvature of the crossover boundary in the T - μ plane nearby μ= 0 is also examined for both cases.