Abstract
Using 13.6 fb-1 of continuum two-jet e+e-→cc̄ 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 Λc + charmed baryon to be produced in the hemisphere opposite a Λc -relative to the likelihood for a Λc + charmed baryon to be produced opposite an anticharmed meson D̄ in all cases, the reconstructed hadrons must have momentum greater than 2.3 GeV/c. We find that, given a Λc - (reconstructed in five different decay modes), a Λc + is observed in the opposite hemisphere (0.72±0.11)% of the time (not corrected for efficiency). By contrast, given a D̄ in one hemisphere, a Λc + is observed in the opposite hemisphere only ±(0.21 0.02)% of the time. Normalized to the total number of either Λc - or D̄ "tags," it is therefore 3.52±0.45±0.42 times more likely to find a Λc + opposite a Λc - than a D̄ meson. This enhancement is not observed in the JETSET 7.3 e+e-→cc̄Monte Carlo simulation.
Original language | English (US) |
---|---|
Article number | 112003 |
Pages (from-to) | 1120031-11200311 |
Number of pages | 10080281 |
Journal | Physical Review D |
Volume | 63 |
Issue number | 11 |
State | Published - 2001 |
ASJC Scopus subject areas
- General Physics and Astronomy
- Nuclear and High Energy Physics
- Mathematical Physics