Observation of the decay τ → ϱππν_τ

Albrecht, H. et al. (1991) Observation of the decay τ → ϱππν_τ. Physics Letters B, 260(1-2), pp. 259-264. (doi: 10.1016/0370-2693(91)91000-L)

Abstract

An analysis of the decay τ− → π−π−π+π0ντ has been performed with the ARGUS detector at the DORIS II storage ring. From a study of the two pion subsystems we have found first evidence for the decays τ− → ϱ0π−π0ντ, τ− → ϱ−π+π−ντ, and τ− → ϱ+π−π−ντ with relative contributions to the decay τ− → π−π−π+π0ντ of 0.30 ± 0.04, 0.26 ± 0.05, and 0.10 ± 0.03, respectively. The fraction of the subchannel τ− → ωπ−ντ has been determined to be 0.33 ± 0.05. The production of ϱ mesons is enhanced by a factor of 1.9 ± 0.3 over that of ω mesons. We conclude that in more than 81% (95% CL) of all τ− → π−π−π+π0ντ decays either a ϱ or ω meson is produced.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Britton, Professor David
• Authors: Albrecht, H., Ehrlichmann, H., Hamacher, T., Krüger, A., Nau, A., Nippe, A., Reidenbach, M., Schäfer, M., Schröder, H., Schulz, H.D., Sefkow, F., Wurth, R., Appuhn, R.D., Hast, C., Herrera, G., Kolanoski, H., Lange, A., Lindner, A., Mankel, R., Schieber, M., Schweda, G., Siegmund, T., Spaan, B., Thurn, H., Walter, A., Wegener, D., Paulini, M., Reim, K., Volland, U., Wegener, H., Mundt, R., Oest, T., Schmidt-Parzefall, W., Funk, W., Stiewe, J., Werner, S., Ball, S., Gabriel, J.C., Geyer, C., Hölscher, A., Hoffmann, W., Holzer, B., Khan, S., Knöpfle, K.T., Spengler, J., Britton, D.I., Charlesworth, C.E.K., Edwards, K.W., Kapitza, H., Krieger, P., Kutschke, R., MacFarlane, D.B., Orr, R.S., Parsons, J.A., Patel, P.M., Prentice, J.D., Seidel, S.C., Tsipolitis, G., Tzamariudaki, K., van de Water, R., Yoon, T.-S., Ressing, D., Schael, S., Schubert, K.R., Strahl, K., Waldi, R., Weseler, S., Bos̆tjančič, B., Kernel, G., Križan, P., Križnič, E., Živko, T., Cronström, H.I., Jönsson, L., Babaev, A., Balagura, V., Danilov, M., Droutskoy, A., Fominykh, B., Golutvin, A., Gorelov, I., Ratnikov, F., Lubimov, V., Rostovtsev, A., Semenov, A., Semenov, S., Shevchencko, V., Soloshenko, V., Tichomirov, I., Zaitsev, Y., Childers, R., and Darden, C.W.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physics Letters B
• Publisher: Elsevier BV
• ISSN: 0370-2693
• Published Online: 20 December 2002