Search for $e^+e^- --> Lambda_b^0 barLambda_b^0 Near Threshold
  Using the CLEO III detector at CESR we study e+e- collisions in the center-of-mass energy close to, or above, Lambda_b anti-Lambda_b production threshold. We search for evidence of Lambda_b anti-Lambda_b resonance production and set upper limits based on inclusive hadron production as a barometer of Lambda_b anti-Lambda_b production. 
D. Besson, et al, CLEO Collaboration