Prediction of the anomalous magnetic moment of nucleon from the nucleon anomaly

Abstract

We construct the effective anomaly lagrangian involving nucleons and photons by using current-current coupling method. The contribution of this lagrangian to the anomalous magnetic moment of nucleon is purely isovector. The anomalous magnetic moment of proton, ${\kappa }_P$, can be calculated from the this lagrangian and it is found to be ${\kappa }_P^{Theor.}=1.77$, which is in excellent agreement with the experimental value ${\kappa }_P^{Exp.}=1.79$. While the case of neutron, ${\kappa }_N^{Theor.}=-2.58$ as compared to ${\kappa }_N^{Exp.}=-1.91$, is less satisfactory, but the sign is correct.

Comments: 7 pages,Latex, no figures