Chiral phase transition in the vector meson extended linear sigma model

FAIR Next Generation ScientistS 2014

Kovács, Péter^1 ; Szép, Zsolt^2 ; Wolf, György^1

Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest

H-1525, Hungary^1

MTA-ELTE Statistical and Biological Physics Research Group, Budapest

H-1117, Hungary^2

关键词: Chiral phase transitions;    Effective potentials;    Field equation;    Hybrid approach;    Order parameter;    Potential dependence;    Scalar mesons;    Zero temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/599/1/012010/pdf
DOI  :  10.1088/1742-6596/599/1/012010

来源: IOP

【 摘 要 】

In the framework of an SU(3) (axial)vector meson extended linear sigma model with additional constituent quarks and Polyakov loops, we investigate the effects of (axial)vector mesons on the chiral phase transition. The parameters of the Lagrangian are set at zero temperature and we use a hybrid approach where in the effective potential the constituent quarks are treated at one-loop level and all the mesons at tree-level. We have four order parameters, two scalar condensates and two Polyakov loop variables and their temperature and baryochemical potential dependence are determined from the corresponding field equations. We also investigate the changes of the tree-level scalar meson masses in the hot and dense medium.