Zeeman-like degeneracy of a massive ferromagnetic mode: charge effects in the spin channel

A study of isotropic single-band ferromagnetism under externally applied magnetic fields reveals that a recently derived massive mode carries a degeneracy with respect to chiral symmetry that may be helpful to identify the presence (or absence) of electrical charge in the spins responsible for ferromagnetism. Calculations for an ESR setup are presented and it is seen that such charge effect may be essential for the observability of the massive mode.