Quantum chromodynamics axion in a hot and magnetized medium

Abstract

The effects of a hot and magnetized medium on the axion mass, self-coupling, and topological susceptibility are analyzed when in the presence of an anisotropic external magnetic field along the z-direction, within the Nambu-Jona-Lasinio effective model for quantum chromodynamics. The effects of both Magnetic Catalysis and Inverse Magnetic Catalysis are explicitly taken into account through appropriate matching of parameters with those from lattice Monte Carlo numerical simulations. The dependence of the results is also analyzed, with respect to different model parametrizations in the context of the Nambu-Jona-Lasinio model.