Measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Ω</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>magnetic moment

A sample of 24 700 ${\mathrm{\ensuremath{\Omega}}}^{\mathrm{\ensuremath{-}}}$ hyperons was produced by a prolarized neutral beam in a spin-transfer reaction. The ${\mathrm{\ensuremath{\Omega}}}^{\mathrm{\ensuremath{-}}}$ polarizations are found to be -0.054\ifmmode\pm\else\textpm\fi{}0.019 and -0.149\ifmmode\pm\else\textpm\fi{}0.055 at mean ${\mathrm{\ensuremath{\Omega}}}^{\mathrm{\ensuremath{-}}}$ momenta of 322 and 398 GeV/c, respectively. The directions of these polarizations give an ${\mathrm{\ensuremath{\Omega}}}^{\mathrm{\ensuremath{-}}}$ magnetic moment of -(1.94\ifmmode\pm\else\textpm\fi{}0.17\ifmmode\pm\else\textpm\fi{}0.14)${\mathrm{\ensuremath{\mu}}}_{\mathit{N}}$