Determination of the radiative decay width of the η meson

Autor: I. Korolko, Klaus R. Schubert, K. Reim, Sebastian Nowak, Mikhail Danilov, A. Hüpper, D. Wegener, A. Kosche, J. Spengler, Werner Hofmann, G. Kostina, R. Mundt, A. Nau, Sergey Semenov, T. Oest, K. Tzamariudaki, H. Albrecht, Thomas Hamacher, Hermann Kolanoski, R. Mankel, R. Wurth, Yu. Gershtein, M. Schramm, S. Werner, R. Reiner, T. S. Yoon, H. Thurn, P. Kržan, A. Snizhko, P. Eckstein, H. Kapitza, H. Wegener, V. Lubimov, S. Weseler, P. Pakhlov, M. Walter, D. O. Litvintsev, D. Reβing, P. Krieger, Ivan Belyaev, T. Podobnik, G. Kernel, B. Spaan, J. Stiewe, J. D. Prentice, R. G. Van de Water, C. Frankl, D. Töpfer, Axel Lindner, Holger Schulz, R. P. Hofmann, C. Hast, Michael Schneider, T. Kirchhoff, S. Chechelnitsky, R. Schwierz, M. Schmidtler, T. Živko, R. Waldi, M. Schieber, K. Ehret, A. Droutskoy, H. Schröder, R. Eckmann, Yu. Zaitsev, K. T. Knöpfle, A. Golutvin, E. Križnič, D. B. Macfarlane, Vladislav Balagura, A. Lange, O. Mai, W. Schmidt-Parzefall, H. Kuipers, P. R. B. Saull, T. Siegmund, I. Tichomirov
Rok vydání: 1994
Předmět:
Zdroj: Physics Letters B. 338:390-396
ISSN: 0370-2693
DOI: 10.1016/0370-2693(94)91395-1
Popis: An analysis of the reaction yy ~ r/c was l~erformed in five different decay channels of the r/c: /~sK+~r ~, K+K-Tr+~ "- , 27r+21r -, ~b~b and 2K+2K -. A value Fry(r/c) = ( 11.3 + 4.2) keV was obtained for the radiative decay width by combining the results from the first four channels. Using our result on the two-photon width we also determined the branching ratio for the decay r/c --~ 2K+2K -.
Databáze: OpenAIRE