New Measurement of the Σ^{-} Magnetic Moment

Abstract

We report a new and more precise measurement of the magnetic moment of the ${\ensuremath{\Sigma}}^{\ensuremath{-}}$ hyperon. Our result of (-1.48\ifmmode\pm\else\textpm\fi{} ${0.37)\mathrm{\ensuremath{\mu}}}_{\mathit{N}}$ is in agreement with the sign given by simple SU(3) theory, but differs somewhat from the value of - ${0.9\mathrm{\ensuremath{\mu}}}_{\mathit{N}}$ predicted by the theory with no mass breaking.