Correlated Lambda(+)(c)(lambda)over-bar(c)(-) production in e(+)e(-) annihilations at root s similar to 10.5 GeV - art. no. 112003

Authors
Bornheim, A Lipeles, E Pappas, SP Schmidtler, M Shapiro, A Sun, WM Weinstein, AJ Jaffe, DE Mahapatra, R Masek, G Paar, HP Asner, DM Eppich, A Hill, TS Morrison, RJ Briere, RA Chen, GP Ferguson, T Vogel, H Gritsan, A Alexander, JP Baker, R Bebek, C Berger, BE Berkelman, K Blanc, F Boisvert, V Cassel, DG Drell, PS Duboscq, JE Ecklund, KM Ehrlich, R Gaidarev, P Galik, RS Gibbons, L Gittelman, B Gray, SW Hartill, DL Heltsley, BK Hopman, PI Hsu, L Jones, CD Kandaswamy, J Kreinick, DL Lohner, M Magerkurth, A Meyer, TO Mistry, NB Nordberg, E Palmer, M Patterson, JR Peterson, D Riley, D Romano, A Thayer, JG Urner, D Valant-Spaight, B Viehhauser, G Warburton, A Avery, P Prescott, C Rubiera, AI Stoeck, H Yelton, J Brandenburg, G Ershov, A Kim, DYJ Wilson, R Bergfeld, T Eisenstein, BI Ernst, J Gladding, GE Gollin, GD Hans, RM Johnson, E Karliner, I Marsh, MA Plager, C Sedlack, C Selen, M Thaler, JJ Williams, J Edwards, KW Janicek, R Patel, PM Sadoff, AJ Ammar, R Bean, A Besson, D Brabant, P Zhao, X Anderson, S Frolov, VV Kubota, Y Lee, SJ O'Neill, JJ Poling, R Riehle, T Smith, A Stepaniak, CJ Urheim, J Ahmed, S Alam, MS Athar, SB Jian, L Ling, L Saleem, M Timm, S Wappler, F Anastassov, A Eckhart, E Gan, KK Gwon, C Hart, T Honscheid, K Hufnagel, D Kagan, H Kass, R Pedlar, TK Schwarthoff, H Thayer, JB von Toerne, E Zoeller, MM Richichi, SJ Severini, H Skubic, P Undrus, A Savinov, V Chen, S Fast, J Hinson, JW Lee, J Miller, DH Shibata, EI Shipsey, IPJ Pavlunin, V Cronin-Hennessy, D Lyon, AL Thorndike, EH Coan, TE Fadeyev, V Gao, YS Maravin, Y Narsky, I Stroynowski, R Ye, J Wlodek, T Artuso, M Boulahouache, C Bukin, K Dambasuren, E Majumder, G Moneti, GC Mountain, R Schuh, S Skwarnicki, T Stone, S Wang, JC Wolf, A Wu, J Kopp, S Kostin, M Mahmood, AH Csorna, SE Danko, I McLean, KW Xu, Z Godang, R Bonvicini, G Cinabro, D Dubrovin, M McGee, S Zhou, GJ
Citation
A. Bornheim et al., Correlated Lambda(+)(c)(lambda)over-bar(c)(-) production in e(+)e(-) annihilations at root s similar to 10.5 GeV - art. no. 112003, PHYS REV D, 6311(11), 2001, pp. 2003
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6311
Issue
11
Year of publication
2001
Database
ISI
SICI code
0556-2821(20010601)6311:11<2003:CLPIEA>2.0.ZU;2-1
Abstract
Using 13.6 fb(-1) of continuum two-jet e(+)e(-) -->c (c) over bar events co llected with the CLEO detector, we have searched for baryon number correlat ions at the primary quark level. We have measured the likelihood for a Lamb da (+)(c) charmed baryon to be produced in the hemisphere opposite a <(<Lam bda>)over bar>(-)(c) relative to the likelihood for a Lambda (+)(c) charmed baryon to be produced opposite an anticharmed meson (D) over bar; in all c ases, the reconstructed hadrons must have momentum greater than 2.3 GeV/c, We find that, given a <(<Lambda>)over bar>(-)(c) (reconstructed in five dif ferent decay modes), a Lambda (+)(c) is observed in the opposite hemisphere (0.72+/-0.11)% of the time (not corrected for efficiency). By contrast, gi ven a (D) over bar in one hemisphere, a Lambda (+)(c) is observed in the op posite hemisphere only (0.21 +/- 0.02)% of the time. Normalized to the tota l number of either <(<Lambda>)over bar>(-)(c) or (D) over bar "tags," it is therefore 3.52 +/- 0.45 +/- 0.42 times more likely to find a Lambda (+)(c) opposite a <(<Lambda>)over bar>(-)(c) than a (D) over bar meson, This enha ncement is not observed in the JETSET 7.3 e(+)e(-)-->c (c) over bar Monte C arlo simulation.