A study of B⁰ → D*⁺ ℓ^- v and B⁰ and B⁰ mixing using partial D*⁺ reconstruction.

Albrecht, H. et al. (1994) A study of B⁰ → D*⁺ ℓ^- v and B⁰ and B⁰ mixing using partial D*⁺ reconstruction. Physics Letters B, 324(2), pp. 249-254. (doi: 10.1016/0370-2693(94)90415-4)

Abstract

Using the ARGUS detector at the e⁺e⁻ storage ring DORIS II at DESY, we have studied the decay <span style="text-decoration: overline">B</span>⁰ → D*⁺ ℓ^- <span style="text-decoration: overline">v</span> by exploiting a partial D∗⁺ reconstruction technique. The branching ratio for this mode was thereby determined to be (4.5 ± 0.3 ± 0.4)%. Using the corresponding sample of tagged B⁰mesons, we measured the B⁰ and <span style="text-decoration: overline">B</span>⁰ mixing parameter to be r_d = 0.194 ± 0.062 ± 0.054, a result only weakly dependent upon the ratio of semileptonic widths for and production rates of B⁰ and B⁺ mesons. We have also determined the branching ratio Br (<span style="text-decoration: overline">B</span>⁰ → X ℓ^- <span style="text-decoration: overline">v</span> to be (9.3 ± 1.1 ± 1.5)%. By comparing the results for full and partial D∗⁺ reconstuction we found the absolute branching ratios for D⁰ → K⁻π⁺ and D⁰ →K⁻π⁺π⁺π⁻ to be (4.5 ± 0.6 ± 0.4)% and (7.9 ± 1.5 ± 0.9)%, respectively.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Britton, Professor David
• Authors: Albrecht, H., Ehrlichmann, H., Hamacher, T., Hofmann, R.P., Kirchhoff, T., Nau, A., Nowak, S., Schröder, H., Schulz, H.D., Walter, M., Wurth, R., Hast, C., Kapitza, H., Kolanoski, H., Kosche, A., Lange, A., Lindner, A., Mankel, R., Schieber, M., Siegmund, T., Spaan, B., Thurn, H., Töpfer, D., Wegener, D., Eckstein, P., Waldi, R., Paulini, M., Reim, K., Wegener, H., Eckmann, R., Mundt, R., Oest, T., Reiner, R., Schmidt-Parzefall, W., Stiewe, J., Werner, S., Ehret, K., Hofmann, W., Hüpper, A., Khan, S., Knöpfle, K.T., Seeger, M., Spengler, J., Britton, D.I., Charlesworth, C.E.K., Edwards, K.W., Hyatt, E.R.F., Krieger, P., MacFarlane, D.B., Patel, P.M., Prentice, J.D., Saull, P.R.B., Tzamariudaki, K., Van de Water, R.G., Yoon, T.-S., Reßing, D., Schmidtler, M., Schnieder, M., Schubert, K.R., Weseler, S., Kernel, G., Križan, P., Križnič, E., Podobnik, T., Živko, T., Balagura, V., Belyaev, I., Chechelnitsky, S., Danilov, M., Droutskoy, A., Gershtein, Y., Golutvin, A., Korolko, I., Kostina, G., Litvintsev, D., Lubimov, V., Pakhlov, P., Semenov, S., Snizhko, A., Tichomirov, I., and Zaitsev, Y.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physics Letters B
• ISSN: 0370-2693
• Published Online: 16 October 2002