Measurement of the product branching fraction B(c ->Theta X-c) x B(Theta(c)->Lambda X) - art. no. 092007

Authors
Ammar, R Baringer, P Brabant, P Bean, A Besson, D Bull, H Davis, R Holliday, J Kotov, S Kravchenko, I Kwak, N Robertson, I Stutz, R Zhao, X Anderson, S Frolov, VV Kubota, Y Lee, SJ Mahapatra, R O'Neill, JJ Poling, R Riehle, T Smith, A Ahmed, S Alam, MS Athar, SB Jian, L Ling, L Mahmood, AH Saleem, M Timm, S Wappler, F Anastassov, A Duboscq, JE Gan, KK Gwon, C Hart, T Honscheid, K Kagan, H Kass, R Lorenc, J Schwarthoff, H von Toerne, E Zoeller, MM Richichi, SJ Severini, H Skubic, P Undrus, A Bishai, M Chen, S Fast, J Hinson, JW Lee, J Menon, N Miller, DH Shibata, EI Shipsey, IPJ Kwon, Y Lyon, AL Thorndike, EH Jessop, CP Lingel, K Marsiske, H Perl, ML Savinov, V Ugolini, D Zhou, X Coan, TE Fadeyev, V Korolkov, I Maravin, Y Narsky, I Stroynowski, R Ye, J Wlodek, T Artuso, M Ayad, R Dambasuren, E Kopp, S Majumder, G Moneti, GC Mountain, R Schuh, S Skwarnicki, T Stone, S Titov, A Viehhauser, G Wang, JC Wolf, A Wu, J Csorna, SE McLean, KW Marka, S Xu, Z Godang, R Kinoshita, K Lai, IC Pomianowski, P Schrenk, S Bonvicini, G Cinabro, D Greene, R Perera, LP Zhou, GJ Chan, S Eigen, G Lipeles, E Schmidtler, M Shapiro, A Sun, WM Urheim, J Weinstein, AJ Wurthwein, F Jaffe, DE Masek, G Paar, HP Potter, EM Prell, S Sharma, V Asner, DM Eppich, A Gronberg, J Hill, TS Lange, DJ Morrison, RJ Nelson, TK Richman, JD Briere, RA Behrens, BH Ford, WT Gritsan, A Krieg, H Roy, J Smith, JG Alexander, JP Baker, R Bebek, C Berger, BE Berkelman, K Blanc, F Boisvert, V Cassel, DG Dickson, M Drell, PS Ecklund, KM Ehrlich, R Foland, AD Gaidarev, P Gibbons, L Gittelman, B Gray, SW Hartill, DL Heltsley, BK Hopman, PI Jones, CD Kreinick, DL Lee, T Liu, Y Meyer, TO Mistry, NB Ng, CR Nordberg, E Patterson, JR Peterson, D Riley, D Thayer, JG Thies, PG Valant-Spaight, B Warburton, A Avery, P Lohner, M Prescott, C Rubiera, AI Yelton, J Zheng, J Brandenburg, G Ershov, A Gao, YS Kim, DYJ Wilson, R Browder, TE Li, Y Rodriguez, JL Yamamoto, H Bergfeld, T Eisenstein, BI Ernst, J Gladding, GE Gollin, GD Hans, RM Johnson, E Karliner, I Marsh, MA Palmer, M Plager, C Sedlack, C Selen, M Thaler, JJ Williams, J Edwards, KW Janicek, R Patel, PM Sadoff, AJ
Citation
R. Ammar et al., Measurement of the product branching fraction B(c ->Theta X-c) x B(Theta(c)->Lambda X) - art. no. 092007, PHYS REV D, 6209(9), 2000, pp. 2007
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6209
Issue
9
Year of publication
2000
Database
ISI
SICI code
0556-2821(20001101)6209:9<2007:MOTPBF>2.0.ZU;2-W
Abstract
Based on a high statistics e(+)e(-) --> c (c) over bar data sample, we repo rt on the inclusive rate for charmed baryons to decay into Lambda particles using charm-event tagging. We select e(+)e(-) --> c (c) over bar events wh ich have a clear anti-charm tag and measure the h content in the hemisphere opposite the tag (charge conjugate modes are implicit). This allows us to determine the product branching fraction B-Lambda = B(c --> Theta X-c) x B( Theta (c) --> LambdaX), where Theta (c) represents a sum over all charmed b aryons produced in e(+)e(-) fragmentation at roots= 10.5 GeV, given our spe cific tags. We obtain B-Lambda =(1.87+/-0.03+/-0.33)%.