1. A search for rare and forbidden decays of η-meson with GAMS-4π
- Author
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Binon, Freddy, Blik, A., Gorin, Alexander, Donskov, Sergey, Inaba, Susumu, Kolosov, V., Ladygin, M., Lednev, Andrey, Lishin, V., Manuilov, Igor, Mikhailov, Yu, Pegneux, J.P. J.P., Polyakov, V., Samoylenko, Vladimir, Sobol, Andrei, Stroot, Jean-Pierre, Sugonyaev, Valentine, Takamatsu, Kunio, Tsuru, Tsuneaki, Khaustov, G., Binon, Freddy, Blik, A., Gorin, Alexander, Donskov, Sergey, Inaba, Susumu, Kolosov, V., Ladygin, M., Lednev, Andrey, Lishin, V., Manuilov, Igor, Mikhailov, Yu, Pegneux, J.P. J.P., Polyakov, V., Samoylenko, Vladimir, Sobol, Andrei, Stroot, Jean-Pierre, Sugonyaev, Valentine, Takamatsu, Kunio, Tsuru, Tsuneaki, and Khaustov, G.
- Abstract
A search for the rare and forbidden neutral decays of η-meson with the GAMS-4π setup has been performed. The charge-exchange reaction at 32.5 GeV/c was used as a source of 3.7 ṡ 106 η-mesons. At the 90% confidence level the following upper limits were obtained: B R (η → 3 γ) < 1.6 ṡ 10-4, B R (η → 4 γ) < 2.8 ṡ 10-4, B R (η → π ° π °) < 3.5 ṡ 10-4, B R (η → π ° π ° γ) < 1.7 ṡ 10-3, B R (η → π ° π ° γ γ) < 4.0 ṡ 10-3, B R (η → 3 π ° γ) < 2.4 ṡ 10-4, B R (η → 4 π °) < 2.0 ṡ 10-5. © 2006 Elsevier B.V. All rights reserved., SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 2006