Upper limit on the absolute branching fraction for Ds+e+

J. Adler, Z. Bai, G. T. Blaylock, T. Bolton, J. C. Brient, T. E. Browder, J. S. Brown, K. O. Bunnell, M. Burchell, T. H. Burnett, R. E. Cassell, D. Coffman, V. Cook, D. H. Coward, F. Dejongh, D. E. Dorfan, J. Drinkard, G. P. Dubois, G. Eigen, K. F. EinsweilerB. I. Eisenstein, T. Freese, C. Gatto, G. Gladding, C. Grab, J. Hauser, C. A. Heusch, D. G. Hitlin, J. M. Izen, P. C. Kim, L. Köpke, J. Labs, A. Li, W. S. Lockman, U. Mallik, C. G. Matthews, A. I. Mincer, R. Mir, P. M. Mockett, B. Nemati, A. Odian, L. Parrish, R. Partridge, D. Pitman, S. A. Plaetzer, J. D. Richman, M. Roco, H. F.W. Sadrozinski, M. Scarlatella, T. L. Schalk, R. H. Schindler, A. Seiden, C. Simopoulos, A. L. Spadafora, I. E. Stockdale, W. Stockhausen, W. Toki, B. Tripsas, F. Villa, M. Z. Wang, S. Wasserbaech, A. Wattenberg, A. J. Weinstein, S. Weseler, H. J. Willutzki, D. Wisinski, W. J. Wisniewski, R. Xu, Y. Zhu

    Research output: Contribution to journalArticlepeer-review


    We report a study of the hadronic branching fractions of the Ds+ meson, which is used to extract an upper limit on the absolute branching fraction for Ds+e+. A search is made for fully reconstructed events from the reaction e+e-Ds*+Ds", Ds*+Ds+, using seven exclusive Ds+ decay modes. The data sample of 6.30+0.46 ppb-1 was collected at ss»=4.14 GeV with the Mark III detector at the SLAC e+e- storage ring SPEAR. No candidate events are observed. The measured relative Ds+ branching fractions and B(Ds+e+) are used to establish the limit B(Ds+e+)<4.1% at 90% confidence level.

    Original languageEnglish (US)
    Pages (from-to)169-171
    Number of pages3
    JournalPhysical Review Letters
    Issue number2
    StatePublished - 1990

    ASJC Scopus subject areas

    • General Physics and Astronomy


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