Spontaneous generation of local CP violation and inverse magnetic catalysis

Abstract

In the chiral symmetric phase, the polarized instanton--anti-instanton molecule pairing induces a nontrivial repulsive interaction in the iso-scalar axial-vector channel. As a consequence, one unusual property is observed that in the chiral restoration phase, there is a first order phase transition for the spontaneous generation of local CP violation and chiral imbalance. Furthermore, it is found that external magnetic fields will lower the critical temperature for the local CP-odd phase transition and catalyze the chiral imbalance, which destroys the chiral condensate with pairing quarks between different chiralities. A reasonable strength of the repulsive interaction in the iso-scalar axial-vector channel can naturally explain the inverse magnetic catalysis around the critical temperature under external magnetic fields.

9 pages, 3 figures

References in corpus (10)

• The Chiral Magnetic Effect
• QCD Phase Transition in a Strong Magnetic Background
• Chiral Properties of Strong Interactions in a Magnetic Background
• Quark-hadron phase transition in a magnetic field
• The chiral condensate in a constant electromagnetic field
• Two-color QCD with staggered fermions at finite temperature under the influence of a magnetic field
• Entanglement between chiral and deconfinement transitions under strong uniform magnetic background field
• Can a strong magnetic background modify the nature of the chiral transition in QCD?
• Implications of CP-violating transitions in hot quark matter on heavy ion collisions
• Spontaneous CP violation in the NJL model at theta = pi

Cited by in corpus (12)

• Novel quantum phenomena induced by strong magnetic fields in heavy-ion collisions
• The chiral phase transition with a chiral chemical potential in the framework of Dyson-Schwinger equations
• Inverse Magnetic Catalysis in the Soft-Wall Model of AdS/QCD
• Charged and neutral vector meson under magnetic field
• Quark magnetar in three-flavor Nambu--Jona-Lasinio model with vector interaction and magnetized gluon potential
• Heavy meson spectroscopy under strong magnetic field
• Inverse Magnetic Catalysis in the three-flavor NJL model with axial-vector interaction
• Chiral phase transition of QCD with $N_f=2+1$ flavors from holography
• Spontaneous chiral symmetry breaking and the Chiral Magnetic Effect for interacting Dirac fermions with chiral imbalance
• Axial current generation by P-odd domains in QCD matter
• Duality between chiral symmetry breaking and charged pion condensation at large $N_c$: Consideration of an NJL${}_2$ model with baryon-, isospin- and chiral isospin chemical potentials
• Deconfinement transition in two-flavour lattice QCD with dynamical overlap fermions