Observation of - production in e+e- annihilation at 29 GeV

Inclusive - production in e+e- annihilation at 29 GeV has been measured with the Mark II detector. From an integrated luminosity of 207 pb-1, we determine a production rate of 0.0140.0060.004 -, + per hadronic event. This is roughly 35 times the Lund-model prediction of 0.0004 -, + per hadronic event, but comparable to the Webber-model prediction of 0.006 -, + per hadronic event. The large rate of - production, compared with production rates for other baryons, and with theoretical predictions based on diquark models, indicates that spin suppression does not hold for - production. © 1987 The American Physical Society.