Chiral transition and the chiral charge density of the hot and dense QCD matter

Abstract

We study the chirally imbalanced hot and dense strongly interacting matter by means of the Dyson-Schwinger equations (DSEs). The chiral phase diagram is studied in the presence of chiral chemical potential ${\mu }_5$. The chiral quark condensate $⟨\bar{\psi }\psi ⟩$ is obtained with the Cornwall-Jackiw-Tomboulis (CJT) effective action in concert with the Rainbow truncation. Catalysis effect of dynamical chiral symmetry breaking (DCSB) by ${\mu }_5$ is observed. We examine with two popular gluon models and consistency is found within the DSE approach, as well as in comparison with lattice QCD. The CEP location $({\mu }_E,T_E)$ shifts toward larger $T_E$ but constant ${\mu }_E$ as ${\mu }_5$ increases. A technique is then introduced to compute the chiral charge density $n_5$ from the fully dressed quark propagator. We find the $n_5$ generally increases with temperature $T$, quark number chemical potential $\mu$ and ${\mu }_5$. Since the chiral magnetic effect (CME) is typically investigated with peripheral collisions, we also investigate the finite size effect on $n_5$ and find an increase in $n_5$ with smaller system size.

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• Chirality Production with Mass Effects-Schwinger Pair Production and the Axial Ward Identity
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• Causality violation and the speed of sound of hot and dense quark matter in the Nambu--Jona-Lasinio model
• Deconfinement and chiral phase transitions in quark matter with chiral imbalance
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• Insignificance of the anomalous magnetic moment of the quarks in presence of chiral imbalance
• Color, Flavor, Temperature and Magnetic Field Dependence of QCD Phase Diagram: Magnetic Catalysis and its Inverse
• Color-flavor dependence of the Nambu-Jona-Lasinio model and QCD phase diagram
• Study of the effects of external imaginary electric field and chiral chemical potential on quark matter
• Finite size effect on the thermodynamics of a hot and magnetized hadron resonance gas
• Phase structures of neutral dense quark matter and application to strange stars