2014/11/30 by Lang Yu, Jos Van Doorsselaere, Mei Huang · 1 citation
Physics and Astronomy · #Chiral anomaly #Condensed matter physics #Coupling constant #High-Energy Particle Collisions Research #Instanton #Inverse #Isoscalar #Particle physics #Particle physics theoretical and experimental studies #Phase transition #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quark #hep-ph
paper · pdf · doi:10.1103/physrevd.91.074011
published as Phys. Rev. D 91, 074011 (2015)
arxiv created 2014/12/12 · openalex publication_date 2015/04/06 · arxiv updated 2015/04/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In this paper we explore the chiral phase transition in QCD within the three-flavor Nambu-Jona-Lasinio model with a negative coupling constant in the isoscalar axial-vector channel, which is associated with a polarized instanton--anti-instanton molecule background. The QCD phase diagram described in this scenario shows a new first order phase transition around the transition temperature Tc toward a phase without chiral condensates, but with nontrivial dynamic chiral chemical potentials for the light quarks, spontaneously giving rise to local charge parity violation and local chirality imbalance. The corresponding critical temperature T5c for this phase transition decreases with the magnetic field and it gives a natural explanation to the inverse magnetic catalysis effect for light quarks when incorporating a reasonable value of the coupling constant in the isoscalar axial-vector channel. Furthermore, when the isoscalar axial-vector interaction is dominant in the light quark sector and suppressed in the strange quark sector, it is found that there is no inverse magnetic catalysis for strange quark condensate, which agrees with lattice results.