Measurement of the polarization of $\Lambda^{0}$, $\overline{\Lambda}^{0}$, $\Sigma^{+}$ and $\Xi^{-}$ produced in a $\Sigma^{-}$ beam of 330 GeV/c

The polarization of Lambda0 , AntiLambda0 , Sigma+ and Xi- inclusively produced in Sigma- induced interactions at 330 GeV has been measured in the experiment WA89 at CERN. This is the first measurement of polarization of baryons produced by a hyperon beam. No polarization of AntiLambda is observed, as was also the case in proton beam data. At transverse momenta of about 1~GeV/c Lambda0 and Sigma+ show little polarization, significantly lower than in the proton beam data, while Xi- have a polarization comparable to the polarization of Lambda0 produced in proton beams.