Search for charm production in direct decays of the Υ{hooked}(1 S) resonance

H. Albrecht, H. Ehrlichmann, T. Hamacher, A. Krüger, A. Nau, A. Nippe, S. Nowak, M. Reidenbach, M. Schäfer, H. Schröder, H. D. Schulz, M. Walter, R. Wurth, R. D. Appuhn, C. Hast, G. Herrera, H. Kolanoski, A. Lange, A. Lindner, R. MankelM. Schieber, T. Siegmund, B. Spaan, H. Thurn, D. Töpfer, A. Walther, D. Wegener, M. Paulini, K. Reim, H. Wegener, R. Mundt, T. Oest, W. Schmidt-Parzefall, W. Funk, J. Stiewe, S. Werner, K. Ehret, A. Hölscher, W. Hofmann, A. Hüpper, S. Khan, K. T. Knöpfle, J. Spengler, D. I. Britton, C. E.K. Charlesworth, K. W. Edwards, E. R.F. Hyatt, H. Kapitza, P. Krieger, D. B. MacFarlane, P. M. Patel, J. D. Prentice, P. R.B. Saull, S. C. Seidel, K. Tzamariudaki, R. G. Van de Water, T. S. Yoon, D. Reßing, M. Schmidtler, M. Schneider, K. R. Schubert, K. Strahl, R. Waldi, S. Weseler, G. Kernel, P. Križan, E. Križnič, T. Podobnik, T. Živko, H. I. Cronström, L. Jönsson, V. Balagura, I. Belyaev, M. Danilov, A. Droutskoy, A. Golutvin, I. Gorelov, G. Kostina, V. Lubimov, P. Murat, P. Pakhlov, F. Ratnikov, S. Semenov, V. Shibaev, V. Soloshenko, I. Tichomirov, Yu Zaitsev

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25 Scopus citations


The production of D*(2010)+ and J/ψ mesons and prompt leptons has been investigated in e+e- interactions at the Ψ(1 S) resonance energy. The data were collected at the storage ring DORIS II at DESY with the ARGUS detector. We obtain upper limits of BRdir (Υ{hooked} (1 S)→D*(2010)±+X)<0.019 (for xp>0.2) and BRdir (Υ{hooked}(1 S)→J/ψ+X)<0.68×10-3, both at the 90% confidence level. From the prompt lepton analysis, a model dependent limit of BRdir (Υ{hooked}(1 S)→Yc+X)<0.034 (Yc denoting a charm-containing particle) is derived.

Original languageEnglish
Pages (from-to)25-31
Number of pages7
JournalZeitschrift für Physik C Particles and Fields
Issue number1
StatePublished - Mar 1992
Externally publishedYes


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