Strange baryon production ine + e − annihilation

The production of strange baryons ine + e − annihilation has been studied at centre of mass energies of 34.8 GeV and 42.1 GeV, using the TASSO detector at DESY. Inclusive cross-sections have been obtained forΛ 0 andΞ − production and an upper limit has been placed upon the production rate of Σ*±(1385). We measure theΛ 0 multiplicity per event to be\(\begin{gathered} \hfill \\ 0.218_{ - 0.011}^{ + 0.011} \pm 0.021 \hfill \\ \end{gathered} \) and\(0.256_{ - 0.029}^{ + 0.030} \pm 0.025\) at\(\sqrt s = 34.8\) and 42.1 GeV respectively. The Ξ− multiplicity per event is found to be\(0.014_{ - 0.003}^{ + 0.003} \pm 0.004\) at\(\sqrt s = 34.8 GeV\). An investigation has been made of the extent to whichΛ 0 are produced in pairs. TheΛ 0 cross-section has been studied as a function of event sphericity.