Study of chi(c1) and chi(c2) meson production in B meson decays - art. no.031102

Authors
Chen, S Fast, J Hinson, JW Lee, J Miller, DH Shibata, EI Shipsey, IPJ Pavlunin, V Cronin-Hennessy, D Lyon, AL Thorndike, EH Savinov, V Coan, TE Fadeyev, V Gao, YS 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 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 Lipeles, E Pappas, SP Schmidtler, M Shapiro, A Sun, WM Weinstein, AJ Wurthwein, F Jaffe, DE Masek, G Paar, HP Potter, EM Prell, S Asner, DM Eppich, A Hill, TS Morrison, RJ Briere, RA Chen, GP 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 Foland, AD Gaidarev, P 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 Yamamoto, H 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 Zhao, X Anderson, S Frolov, VV Kubota, Y Lee, SJ Mahapatra, R 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 Eckart, 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
Citation
S. Chen et al., Study of chi(c1) and chi(c2) meson production in B meson decays - art. no.031102, PHYS REV D, 6303(3), 2001, pp. 1102
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6303
Issue
3
Year of publication
2001
Database
ISI
SICI code
0556-2821(20010201)6303:3<1102:SOCACM>2.0.ZU;2-X
Abstract
Using a sample of 9.7 X 10(6) B (B) over bar meson pairs collected with the CLEO detector, we study B decays to the chi (c1) and chi (c2) charmonia st ates, which are reconstructed via their radiative decays to J/psi. We first measure the branching fraction for inclusive chi (c1) production in B deca ys to be B(B --> chi X-c1) = (4.14 +/- 0.31 +/- 0.40) X 10(-3) where the fi rst uncertainty is statistical and the second one is systematic. We derive the branching fractions for direct chi (c1) and chi (c2) production in B de cays by subtracting the known contribution of the decay chain B --> psi (2S )X with psi (2S)--> chi (c1,2)gamma. We obtain B[B --> chi (c1) (direct)X] =(3.83 +/- 0.31 +/- 0.40) X 10(-3). No statistically significant signal for chi (c2) production is observed in either case. Using the Feldman-Cousins approach, we determine the 95% confidence intervals to be [0.2.2.0] X 10(-3 ) for B(B --> chi X-c2). [0.0,1.7] X 10(-3) for B[B --> chi (c2) (direct)X] , and [0.00,0.44] for the ratio Gamma [B --> chi (c2) (direct)X-y]/Gamma [B --> chi (c1) (direct)X-s]. We also measure the branching ratio Gamma [B -- > chi (c2) (direct)X-y]/Gamma [B --> chi (c1) (direct)X-s] for different X- s configurations by reconstructing B decays into exclusive final states wit h J/psi, gamma, a kaon, and up to four pions. For all the X-s configuration s, we observe a strong chi (c1) signal yet no statistically significant chi (c2) signal. We discuss how our results compare with theoretical predictio ns in different models of charmonium production.