Observation of inclusive [ital B] decays to the charmed baryons [Sigma][sub [ital c]][sup ++] and [Sigma][sub [ital c]][sup 0]

• Published in: Physical review letters Vol. 73:11
• Main Authors: Procario, M., Balest, R., Cho, K., Daoudi, M., Ford, W.T., Johnson, D.R., Lingel, K., Lohner, M., Rankin, P., Smith, J.G., Alexander, J.P., Bebek, C., Berkelman, K., Bloom, K., Browder, T.E., Cassel, D.G., Cho, H.A., Coffman, D.M., Drell, P.S., Ehrlich, R., Galik, R.S., Garcia-Sciveres, M., Geiser, B., Gittelman, B., Gray, S.W., Hartill, D.L., Heltsley, B.K., Jones, C.D., Jones, S.L., Kandaswamy, J., Katayama, N., Kim, P.C., Kreinick, D.L., Ludwig, G.S., Masui, J., Mevissen, J., Mistry, N.B., Ng, C.R., Nordberg, E., Patterson, J.R., Peterson, D., Riley, D., Salman, S., Sapper, M., Wuerthwein, F., Avery, P., Freyberger, A., Rodriguez, J., Stephens, R., Yang, S., Yelton, J., Cinabro, D., Henderson, S., Liu, T., Saulnier, M., Wilson, R., Yamamoto, H., Bergfeld, T., Eisenstein, B.I., Gollin, G., Ong, B., Palmer, M., Selen, M., Thaler, J.J., Sadoff, A.J., Ammar, R., Ball, S., Baringer, P., Bean, A., Besson, D., Coppage, D., Copty, N., Davis, R., Hancock, N., Kelly, M., Kwak, N., Lam, H., Ku
• Format: Journal Article
• Language: English
• Published: United States 12-09-1994
• Subjects: 662350 - Decays of Mesons- (1992-); B MESONS; BARYONS; BEAUTY PARTICLES; BOSONS; BOTTOMONIUM; BRANCHING RATIO; CHARM PARTICLES; CHARMED BARYONS; DECAY; ELEMENTARY PARTICLES; FERMIONS; HADRONS; LAMBDA C PLUS BARYONS; MESONS; PARTICLE DECAY; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PIONS; PSEUDOSCALAR MESONS; QUARKONIUM; SIGMA C-2450 BARYONS; STORAGE RINGS; UPSILON-10575 MESONS; VECTOR MESONS; WEAK HADRONIC DECAY; WEAK PARTICLE DECAY
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.73.1472

Using data collected in the region of the [Upsilon](4[ital S]) resonance with the CLEO II detector operating at the Cornell Electron Storage Ring, we report on evidence for the production of [Sigma][sub [ital c]][sup ++] and [Sigma][sub [ital e]][sup 0] baryons in [ital B] decays, with [Sigma][sub [ital c]][r arrow][Lambda][sub [ital c]][sup +][pi]. This observation is based on 77[plus minus]19[Sigma][sub [ital c]][sup ++] and 76[plus minus]21[Sigma][sub [ital c]][sup 0] candidates from [ital B] decays. We find the product branching fractions [ital scrB]([ital [bar B]][r arrow][Sigma][sub [ital c]][ital X])[ital scrB]([Lambda][sub [ital c]][sup +][r arrow][ital pK][sup [minus]][pi][sup +]) for [Sigma][sub [ital c]]=[Sigma][sub [ital c]][sup ++], [Sigma][sub [ital c]][sup 0], and [Sigma][sub [ital c]][sup +] to be (2.1[plus minus]0.8[plus minus]0.7)[times]10[sup [minus]4], (2.3[plus minus]0.8[plus minus]0.7)[times]10[sup [minus]4], and less than 4.8[times]10[sup [minus]4] at 90% confidence level, respectively. A study of the [Sigma][sub [ital c]][sup ++] and [Sigma][sub [ital c]][sup 0] momentum spectra indicates that [ital B] decays to two-body final states with [Sigma][sub [ital c]] are suppressed.