Production of strange baryons ine+e−annihilations at 29 GeV

The production of strange baryons ${\Sigma }^{\pm }$ (1385) and ${\Xi }^{\mathrm{-}}$ has been observed in $e^{+}$ $e^{\mathrm{-}}$ annihilations at 29 GeV center-of-mass energy, by use of data obtained with the High Resolution Spectrometer at the SLAC storage ring PEP. The total mean multiplicities are measured to be 〈$n_{\Sigma }^{\pm }$(1385)〉=0.033±0.006±0.005 and &〉=0.016±0.004 ±0.004 per hadronic event. The results are in good agreement with the Lund string model.