Correlated /-/ production in e+e- annihilations at sqrts~10.5 GeV
Abstract
Using 13.6/fb of continuum two-jet e+e- -> ccbar events collected with the CLEO detector, we have searched for baryon number correlations at the primary quark level. We have measured the likelihood for a /+ charmed baryon to be produced in the hemisphere opposite a /- relative to the likelihood for a /+ charmed baryon to be produced opposite an anticharmed meson Dbar; in all cases, the reconstructed hadrons must have momentum greater than 2.3 GeV/c. We find that, given a /- (reconstructed in five different decay modes), a /+ is observed in the opposite hemisphere (0.72+/-0.11)% of the time (not corrected for efficiency). By contrast, given a Dbar in one hemisphere, a /+ is observed in the opposite hemisphere only (0.21+/-0.02)% of the time. Normalized to the total number of either /- or Dbar ``tags'', it is therefore 3.52+/-0.45+/-0.42 times more likely to find a /+ opposite a /- than a Dbar meson. This enhancement is not observed in the JETSET 7.3 e+e- -> ccbar Monte Carlo simulation.
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