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

• Received 23 April 1991

DOI:https://doi.org/10.1103/PhysRevLett.67.804