Constraint on the magnetic field for the stable strange quark matter

Abstract

The quasiparticle model is employed to investigate the quark matter at finite chemical potential. The effective bag constant is derived to be dependent on both the chemical potential and the magnetic field. The self-consistent thermodynamics is fulfilled that the free energy minimum corresponds to the zero pressure. It is shown that the strong magnetic field is helpful for the stabilization of the strange quark matter. However, the increase in the coupling constant and the vacuum bag constant could reduce the stability. For the absolutely stable strange quark matter, there is a lower limit of the allowed magnetic field, which rises with the increase in the coupling constant and the vacuum bag constant.