Precise Determination of the Strangeness Magnetic Moment of the Nucleon

Abstract

By combining the constraints of charge symmetry with new chiral extrapolation techniques and recent low mass quenched lattice-QCD simulations of the individual quark contributions to the magnetic moments of the nucleon octet, we obtain a precise determination of the strange magnetic moment of the proton. The result, namely, $G_M^s=(-0.046\pm 0.019){\mu }_N$ is consistent with the latest experimental measurements but an order of magnitude more precise. This poses a tremendous challenge for future experiments.