Investigation of the decays {Mathematical expression} and {Mathematical expression}

H. Albrecht, H. Ehrlichmann, T. Hamacher, R. P. Hofmann, T. Kirchhoff, A. Nau, S. Nowak, H. Schröder, H. D. Schulz, M. Walter, R. Wurth, R. D. Appuhn, C. Hast, H. Kolanoski, A. Lange, A. Lindner, R. Mankel, M. Schieber, T. Siegmund, B. SpaanH. Thurn, D. Töpfer, A. Walther, D. Wegener, M. Bittner, P. Eckstein, M. Paulini, K. Reim, H. Wegener, R. Mundt, T. Oest, R. Reiner, W. Schmidt-Parzefall, W. Funk, J. Stiewe, S. Werner, K. Ehret, 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, K. Tzamariudaki, R. G. Van de Water, T. 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, V. Balagura, I. Belyaev, S. Chechelnitsky, M. Danilov, A. Droutskoy, Yu Gershtein, A. Golutvin, I. Gorelov, G. Kostina, V. Lubimov, P. Pakhlov, F. Ratnikov, S. Semenov, V. Shibaev, V. Soloshenko, I. Tichomirov, Yu Zaitsev

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Abstract

Exclusive semileptonic B decays with a D*+ meson in the final state have been studied using the ARGUS detector at the DORIS II storage ring. The branching ratio for the decay {Mathematical expression}, where ℓ- is either e- or μ-, has been measured to be (5.2±0.5±0.6)%. A significant rate for the decay {Mathematical expression} has been observed. From an angular analysis of the cascade {Mathematical expression} the forward-backward asymmetry AFB and the D*+ polarization parameter α have been determined to be AFB=0.20±0.08±0.06 and α=1.1±0.4±0.2.

Original languageEnglish (US)
Pages (from-to)533-540
Number of pages8
JournalZeitschrift für Physik C Particles and Fields
Volume57
Issue number4
DOIs
StatePublished - Dec 1993

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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