Correlated Lambda(+)(c)(lambda)over-bar(c)(-) production in e(+)e(-) annihilations at root s similar to 10.5 GeV
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Using 13.6 fb-1 of continuum two-jet e+e-cc 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 Ac+ charmed baryon to be produced in the hemisphere opposite a Ac- relative to the likelihood for a Ac- charmed baryon to be produced opposite an anticharmed meson D; in all cases, the reconstructed hadrons must have momentum greater than 2.3 GeV/c. We find that, given a Ac- (reconstructed in five different decay modes), a Ac+ is observed in the opposite hemisphere (0.720.11)% of the time (not corrected for efficiency). By contrast, given a D in one hemisphere, a Ac+ is observed in the opposite hemisphere only (0.21 0.02)% of the time. Normalized to the total number of either Ac- or D "tags," it is therefore 3.520.450.42 times more likely to find a Ac+ opposite a A~ than a D meson. This enhancement is not observed in the JETSET 7.3 e+e-cc Monte Carlo simulation. 2001 The American Physical Society.