Correlated ac+ac- production in e+e- annihilations at √s-10.5 GeV
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
Physical Review D
Bornheim, A.; Lipeles, E.; Pappas, S. P.; Schmidtler, M.; Shapiro, A.; Sun, W. M.; Weinstein, A. J.; Jaffe, D. E.; Mahapatra, R.; Masek, G.; Paar, H. P.; Asner, D. M.; Eppich, A.; Hill, T. S.; Morrison, R. J.; Briere, R. A.; Chen, G. P.; Ferguson, T.; Vogel, H.; Gritsan, A.; Alexander, J. P.; Baker, R.; Bebek, C.; Berger, B. E.; Berkelman, K.; Blanc, F.; Boisvert, V.; Cassel, D. G.; Drell, P. S.; Duboscq, J. E.; Ecklund, K. M.; Ehrlich, R.; and Gaidarev, P., "Correlated ac+ac- production in e+e- annihilations at √s-10.5 GeV" (2001). Faculty Articles Indexed in Scopus. 2251.