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 journalArticle

    Abstract

    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
    Volume64
    Issue number2
    DOIs
    StatePublished - 1990

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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  • Cite this

    Adler, J., Bai, Z., Blaylock, G. T., Bolton, T., Brient, J. C., Browder, T. E., Brown, J. S., Bunnell, K. O., Burchell, M., Burnett, T. H., Cassell, R. E., Coffman, D., Cook, V., Coward, D. H., Dejongh, F., Dorfan, D. E., Drinkard, J., Dubois, G. P., Eigen, G., ... Zhu, Y. (1990). Upper limit on the absolute branching fraction for Ds+e+. Physical Review Letters, 64(2), 169-171. https://doi.org/10.1103/PhysRevLett.64.169