Polarization of the Λ0 Particle Produced from Protons in Carbon Nuclei by 1.17-BeV/cNegative Pions

The angular distribution of the direction and polarization of the ${\ensuremath{\Lambda}}^{0}$ particles produced from the protons in carbon nuclei by 1.17-BeV/c ${\ensuremath{\pi}}^{\ensuremath{-}}$ have been measured in a magnetic-spark-chamber system. From a total of 794 observed ${\ensuremath{\Lambda}}^{0}'\mathrm{s}$ the mean polarization was found to be -0.68\ifmmode\pm\else\textpm\fi{}0.10. Both the direction and polarization distributions show close similarity to those produced in hydrogen at this momentum.