Correlated ac +ac - production in e+e- annihilations at √s-10.5 GeV

CLEO Collaboration

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

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 (0.72±0.11)% 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 3.52±0.45±0.42 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.

Original languageEnglish (US)
Article number112003
JournalPhysical Review D
Volume63
Issue number11
DOIs
StatePublished - 2001

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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