InclusiveJ/ψ production in decays ofB mesons

Autor: Maschmann, W., Antreasyan, D., Bartels, H. W., Besset, D., Bieler, Ch., Bienlein, J. K., Bizzeti, A., Bloom, E. D., Brock, I., Brockmüller, K., Cabenda, R., Cartacci, A., Cavalli-Sforza, M., Clare, R., Compagnucci, A., Conforto, G., Cooper, S., Cowan, R., Coyne, D., Engler, A., Fairfield, K., Folger, G., Fridman, A., Gaiser, J., Gelphman, D., Glaser, G., Godfrey, G., Graaf, K., Heimlich, F. H., Heinsius, F. H., Hofstadter, R., Irion, J., Jakubowski, Z., Janssen, H., Karch, K., Keh, S., Kiel, T., Kilian, H., Kirkbride, I., Kloiber, T., Kobel, M., Koch, W., König, A. C., Königsmann, K., Kraemer, R. W., Krüger, S., Landi, G., Lee, R., Leffler, S., Lekebusch, R., Litke, A. M., Lockman, W., Lowe, S., Lurz, B., Marlow, D., Marsiske, H., McBride, P., Messing, F., Metzger, W. J., Meyer, H., Monteleoni, B., Muryn, B., Nernst, R., Niczyporuk, B., Nowak, G., Peck, C., Pelfer, P. G., Pollock, B., Porter, F. C., Prindle, D., Ratoff, P., Reidenbach, M., Renger, B., Rippich, C., Scheer, M., Schmitt, P., Schotanus, J., Schütte, J., Schwarz, A., Sievers, D., Skwarnicki, T., Stock, V., Strauch, K., Strohbusch, U., Tompkins, J., Trost, H. J., van Uitert, B., Van de Walle, R. T., Vogel, H., Voigt, A., Volland, U., Wachs, K., Wacker, K., Walk, W., Wegener, H., Williams, D. A., Zschorsch, P.
Zdroj: Zeitschrift für Physik C Particles and Fields; December 1990, Vol. 46 Issue: 4 p555-562, 8p
Abstrakt: The production ofJ/ψ inB meson decays has been measured on the Γ(4S) resonance using the Crystal Ball detector at thee+e− storage ring DORIS II. TheJ/ψ is identified by itse+e− decay mode. We obtain a branching ratio of BR(B→J/ψX)=(1.12±0.33±0.25)% in good agreement with theoretical predictions based on color suppression. TheJ/ψ momentum distribution is observed to be peaked at high values. This implies a substantial contribution from directB meson decays to theJ/ψ. In addition upper limits onJ/ψ production in Γ(1S) and Γ(2S) decays and in continuum processes are determined.
Databáze: Supplemental Index
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