Heavy hyperons production in DIS at COMPASS

The yields of heavy hyperons and antihyperons were measured in deep inelastic scattering at the COMPASS experiment at CERN. The data were collected in 2003-2004 using 160 GeV polarised muon beam scattered off a large polarized $^{6}$LiD target. Clear signals from $\Sigma^{+}$(1385), $\Sigma^{−}$(1385), $\Xi^{−}$(1321) hyperons and their antiparticles were observed. The ratios of yields of various hyperons ($\Sigma^{\pm}/\Lambda,\bar{\Sigma}^{/pm}/\bar{\Lambda},\Xi^{-}/Lambda$ and $\bar{\Xi}^{+}/\bar{\Lambda}$) were measured. These ratios were used to tune parameters of the LEPTO generator. The comparison of these yields with the corresponding ones obtained for the low$–Q^{2}$ region is also presented.