Measurement of the relative branching fraction of gamma r(4S) to charged and neutral B-meson pairs

Authors
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 Lohner, M Magerkurth, A Meyer, TO Mistry, NB Nordberg, E Patterson, JR Peterson, D Riley, D Thayer, JG Thies, PG Valant-Spaight, B Warburton, A Avery, P 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, RW Janicek, R Patel, PM Sadoff, AJ Ammar, R Bean, A Besson, D Davis, R Kwak, N Zhao, X Anderson, S Frolov, VV Kubota, Y Lee, SJ Mahapatra, R O'Neill, JJ Poling, R Riehle, T Smith, A Urheim, J Ahmed, S Alam, MS Athar, SB Jian, L Ling, L Mahmood, AH Saleem, M Timm, S Wappler, F Anastassov, A Duboscq, JE 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 Chen, S Fast, J Hinson, JW Lee, J Menon, N Miller, DH Shibata, EI Shipsey, IPJ Pavlunin, V Cronin-Hennessy, D Kwon, Y Lyon, AL Thorndike, EH Jessop, CP Marsiske, H Perl, ML Savinov, V Ugolini, D Zhou, X Coan, TE Fadeyev, V Maravin, Y Narsky, I Stroynowski, R Ye, J Wlodek, T Artuso, M Ayad, R Boulahouache, C Bukin, K Dambasuren, E Karamov, S Majumder, G Moneti, GC Mountain, R Schuh, S Skwarnicki, T Stone, S Viehhauser, G Wang, JC Wolf, A Wu, J Kopp, S Csorna, SE Danko, I McLean, KW Marka, S Xu, Z Godang, R Kinoshita, K Lai, IC Schrenk, S Bonvicini, G Cinabro, D McGee, S Perera, LP Zhou, GJ Lipeles, E Schmidtler, M Shapiro, A Sun, WM Weinstein, AJ Wurthwein, F Jaffe, DE Masek, G Paar, HP Potter, EM Press, S Sharma, V Asner, DM Eppich, A Hill, TS Morrison, RJ Briere, RA Behrens, BH Ford, WT Gritsan, A Roy, J Smith, JG
Citation
Jp. Alexander et al., Measurement of the relative branching fraction of gamma r(4S) to charged and neutral B-meson pairs, PHYS REV L, 86(13), 2001, pp. 2737-2741
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
86
Issue
13
Year of publication
2001
Pages
2737 - 2741
Database
ISI
SICI code
0031-9007(20010326)86:13<2737:MOTRBF>2.0.ZU;2-U
Abstract
We analyze 9.7 X 10(6) B (B) over bar pairs recorded with the CLEO detector to determine the production ratio of charged to neutral B-meson pairs prod uced at the Y(4S) resonance. We measure the rates for B-0 --> J/psiK((*)0) and B+ --> J/psiK((*)+) decays and use the world-average B-meson lifetime r atio to extract the relative widths f(+-)/f(00) = Gamma (Y(4S)-->B+B-)/Gamm a (Y(4S)-->B-0(B) over bar (0)) = 1.04 +/- 0.07(stat) +/- 0.04(syst). With the assumption that f(+-) + f(00) = 1, we obtain f(00) = 0.49 +/- 0.02(stat ) +/- 0.01(syst) and f(+-) = 0.51 +/- 0.02(stat) +/- 0.01(syst). This produ ction ratio and its uncertainty apply to all exclusive B-meson branching fr actions measured at the Y(4S) resonance.