Correlated leading baryon-antibaryon production in e+e- --> ccbar --> Lambdac+ antiLambdac- X
Abstract
We present a study of 649 35 e+e- --> ccbar events produced at sqrts~10.6 GeV containing both a Lambdac baryon and a Lambdac antibaryon. The number observed is roughly four times that expected if the leading charmed hadron types are uncorrelated, confirming an observation by the CLEO Collaboration. We find a 2-jet topology in these events but very few additional baryons, demonstrating that the primary c and cbar are predominantly contained in a correlated baryon-antibaryon system. In addition to the charmed baryons we observe on average 2.6 0.2 charged intermediate mesons, predominantly pions, carrying 65% of the remaining energy.
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