Abstract
Previous attempts to used modified propagators in field-theory calculations have been frustrated by the appearance of ghost states in the propagator when one tries to improve on conventional perturbation theory. Recently a method of eliminating these ghosts has been suggested. By following this suggested procedure it is possible to calculate the magnetic moments of nucleons by using a modified nucleon propagator, which should be an improvement on simple perturbation theory without introducing any spurious infinities. This calculation has been performed approximately and yields magnetic moments of + 1.2 and − 2.3 nuclear magnetons for the proton and neutron, respectively, compared with the experimental values of 1.8 and − 1.9. The improvement over perturbation theory is achieved because of a strong damping of the nucleon recoil term.
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