1304.7951 (J. P. W. Diener et al.)

Nuclear matter in strong magnetic fields    [PDF]

J. P. W. Diener, F. G. Scholtz

Strongly magnetized nuclear matter within the context of Quantum Hadrodynamics (Walecka-model) and its extensions is investigated in this article. The magnetic field is coupled to the charge and dipole moment of the baryons by including the appropriate terms in the Lagrangian density. The saturation density of magnetized, symmetric nuclear matter was calculated for magnetic fields of the order of 10^17 gauss. For the calculated range of saturation densities the binding energy, symmetry energy coefficient and compressibility of nuclear matter were also calculated. It is found that with an increasing magnetic field the saturation density also increases, while the system becomes less bound. Furthermore, the depopulation of proton Landau levels leaves a distinct oscillatory imprint on both the symmetry energy coefficient and the compressibility. The calculations were also performed for increased values of the baryon magnetic dipole moment. By increasing the dipole moment strength the saturation density is found to decrease, but the system becomes more tightly bound while the oscillatory behavior of symmetry energy coefficient and the compressibility persists.

View original: http://arxiv.org/abs/1304.7951