Landau parameters for asymmetric nuclear matter with a strong magnetic field

TL;DR

This paper calculates Landau Fermi Liquid parameters for asymmetric nuclear matter under strong magnetic fields, revealing effects of Landau level quantization and magnetic polarization on quasiparticle interactions.

Contribution

It introduces relativistic mean-field calculations of Landau parameters in magnetized asymmetric nuclear matter, highlighting the impact of magnetic fields and Landau level quantization.

Findings

Landau parameters show discretized features due to Landau levels.

Magnetic fields cause degeneracy resolution in quasiparticle interaction energies.

Low magnetic fields induce mild changes, high fields significantly alter quasiparticle degeneracy.

Abstract

The Landau Fermi Liquid parameters are calculated for charge neutral asymmetric nuclear matter in beta equilibrium at zero temperature in the presence of a very strong magnetic field with relativistic mean-field models. Due to the isospin structure of the system, with different populations of protons and neutrons and spin alignment to the field, we find non-vanishing Landau mixing parameters. The existence of quantized Landau levels for the charged sector has some impact on the Landau parameters with the presence of discretized features in those involving the proton sector. Using the Fermi liquid formalism singlet and triplet excited quasiparticle states are analyzed, and we find that in-medium effects and magnetic fields are competing, however, the former are more important in the interaction energy range considered. It is found that for magnetic field strengths Log$_{10}$ B (G) $\le 17$ the relative low polarization of the system produces mild changes in the generalized Landau parameters with respect to the unmagnetized case, while for larger strengths there is a resolution of the degeneracy of the interaction energies of quasiparticles in the system.