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.

References in corpus (4)

• Interacting fermions in rotation: chiral symmetry restoration, moment of inertia and thermodynamics
• Chiral magnetic effect in lattice QCD with a chiral chemical potential
• Chiral and deconfinement transition from correlation functions: SU(2) vs. SU(3)
• Modeling Finite-Volume Effects and Chiral Symmetry Breaking in Two-Flavor QCD Thermodynamics

Cited by in corpus (2)

• Topological susceptibility, divergent chiral density and phase diagram of chirally imbalanced QCD medium at finite temperature
• Phase structures of neutral dense quark matter and application to strange stars