Correlated Λc +Λ̄c - production in e+e- annihilations at √s∼10.5 GeV

A. Bornheim, E. Lipeles, S. P. Pappas, M. Schmidtler, A. Shapiro, W. M. Sun, A. J. Weinstein, D. E. Jaffe, R. Mahapatra, G. Masek, H. P. Paar, D. M. Asner, A. Eppich, T. S. Hill, R. J. Morrison, R. A. Briere, G. P. Chen, T. Ferguson, H. Vogel, A. GritsanJ. P. Alexander, R. Baker, C. Bebek, B. E. Berger, K. Berkelman, F. Blanc, V. Boisvert, D. G. Cassel, P. S. Drell, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, P. Gaidarev, R. S. Galik, L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, P. I. Hopman, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, M. Lohner, A. Magerkurth, T. O. Meyer, N. B. Mistry, E. Nordberg, M. Palmer, J. R. Patterson, D. Peterson, D. Riley, A. Romano, J. G. Thayer, D. Urner, B. Valant-Spaight, G. Viehhauser, A. Warburton, P. Avery, C. Prescott, A. I. Rubiera, H. Stoeck, J. Yelton, G. Brandenburg, A. Ershov, D. Y J Kim, R. Wilson, T. Bergfeld, B. I. Eisenstein, J. Ernst, G. E. Gladding, G. D. Gollin, R. M. Hans, E. Johnson, I. Karliner, M. A. Marsh, C. Plager, C. Sedlack, M. Selen, J. J. Thaler, J. Williams, K. W. Edwards, R. Janicek, P. M. Patel, A. J. Sadoff, R. Ammar, A. Bean, D. Besson, P. Brabant, X. Zhao, S. Anderson, V. V. Frolov, Y. Kubota, S. J. Lee, J. J. O'Neill, R. Poling, T. Riehle, A. Smith, C. J. Stepaniak, J. Urheim, S. Ahmed, M. S. Alam, S. B. Athar, L. Jian, L. Ling, M. Saleem, S. Timm, F. Wappler, A. Anastassov, E. Eckhart, K. K. Gan, C. Gwon, T. Hart, K. Honscheid, D. Hufnagel, H. Kagan, R. Kass, T. K. Pedlar, H. Schwarthoff, J. B. Thayer, E. von Toerne, M. M. Zoeller, S. J. Richichi, H. Severini, P. Skubic, A. Undrus, V. Savinov, S. Chen, J. Fast, J. W. Hinson, J. Lee, D. H. Miller, E. I. Shibata, I. P J Shipsey, V. Pavlunin, D. Cronin-Hennessy, A. L. Lyon, E. H. Thorndike, T. E. Coan, V. Fadeyev, Y. S. Gao, Y. Maravin, I. Narsky, R. Stroynowski, J. Ye, T. Wlodek, Marina Artuso, C. Boulahouache, K. Bukin, E. Dambasuren, G. Majumder, G. C. Moneti, R. Mountain, S. Schuh, Tomasz Skwarnicki, Sheldon Stone, J. C. Wang, A. Wolf, J. Wu, S. Kopp, M. Kostin, A. H. Mahmood, S. E. Csorna, I. Danko, K. W. McLean, Z. Xu, R. Godang, G. Bonvicini, D. Cinabro, M. Dubrovin, S. McGee, G. J. Zhou

Research output: Contribution to journalArticle

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 languageEnglish (US)
Article number112003
Pages (from-to)1120031-11200311
Number of pages10080281
JournalPhysical Review D
Volume63
Issue number11
StatePublished - 2001

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

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., ... Zhou, G. J. (2001). Correlated Λc +Λ̄c - production in e+e- annihilations at √s∼10.5 GeV. Physical Review D, 63(11), 1120031-11200311. [112003].