Title

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

Document Type

Article

Publication Date

1-1-2001

Abstract

Using 13.6 fb 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 A charmed baryon to be produced in the hemisphere opposite a A relative to the likelihood for a A 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 A (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 A is observed in the opposite hemisphere only (0.21 ±0.02)% of the time. Normalized to the total number of either A or D "tags," it is therefore 3.52±0.45±0.42 times more likely to find a A 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. -1 + - + - - - + - + + - c c c c c c c

Publication Name

Physical Review D

Volume Number

63

Issue Number

11

DOI

10.1103/PhysRevD.63.112003

Article

112003

This document is currently not available here.

Share

COinS