It is shown that the phenomenological description of the baryon magnetic moments in the
quark model carries over to the Poincaré covariant extension of the model. This applies to all
the three common forms of relativistic kinematics with structureless constituent currents,
which are covariant under the corresponding kinematic subgroups. In instant and front form
kinematics the calculated magnetic moments depend strongly on the constituent masses,
while in point form kinematics the magnetic moments are fairly insensitive to both the quark …

Magnetic moments of baryons in the ground-state octet and decuplet are calculated in a light-
front framework. We investigate the effects of quark mass variation both in the current
operator and in the wavefunctions. A simple fit uses single oscillator wavefunctions for the
baryons and allows the three flavors of quark to have nonzero anomalous magnetic
moments. We find a good fit to the data without allowing for strange quark contributions to
the nucleon moments. A slightly better fit is obtained by allowing for explicit SU (3) _f …