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arXiv · 1602.00062

Continuum study on QCD phase diagram through an OPE-modified gluon propagator

Chao Shi·Yi-Lun Du·Shu-Sheng Xu·Xiao-Jun Liu·Hong-Shi Zong
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Abstract

Within the Dyson-Schwinger equations (DSEs) framework, a gluon propagator model incorporating quark's feedback through operator product expansion (OPE) is introduced to investigate the QCD phase diagram in the temperature--chemical-potential ($T-\mu$) plane. Partial restoration of chiral symmetry at zero temperature and finite temperature are both studied, suggesting a first order phase transition point on the $\mu$ axis and a critical end point at $(T_E,\mu_E)/T_c = (0.85,1.11)$, where $T_c$ is the pseudo-critical temperature. In addition, we find the pseudo-critical line can be well parameterized with the curvature parameter $\kappa$ and a consistent decrease in $\kappa$ with more of gluon propagator distributed to quark's feedback.

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Chao Shi, Yi-Lun Du, Shu-Sheng Xu, Xiao-Jun Liu, Hong-Shi Zong. 2016-01-30. Continuum study on QCD phase diagram through an OPE-modified gluon propagator. https://doi.org/10.1103/physrevd.93.036006

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