MEASUREMENT OF INCLUSIVE LAMBDA PRODUCTION IN ELECTRON-POSITRON INTERACTIONS AT THE UPSILON ENERGIES

Using the MD-1 detector at the VEPP-4 e+e- strorage ring we have measured the inclusive LAMBDA and XI-production rates in direct UPSILON (1 S) decays [n(LAMBDA)(UPSILON(1S)dir)] = 0.194 +/- 0.018 +/- 0.017, [n(XI)-(UPSILON(1S)dir)] = 0.038 +/- 0.015 +/- 0.009. The LAMBDA momentum spectrum in direct UPSILON(1S) decays was obtained. We have measured also the -inclusive A production rate in the continuum at center of mass energies between 7.2 and 10.0 GeV [n(LAMBDA)(cont.)] = 0.076 +/- 0.018 +/- 0.015. In the range of cms energies between 7.2 and 9.4 GeV this measurement was performed for the first time.