par 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.
Référence Nuclear physics. B, Proceedings supplement, 162, SPEC. ISS., page (155-160)
Publication Publié, 2006-12
;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.Référence Nuclear physics. B, Proceedings supplement, 162, SPEC. ISS., page (155-160)
Publication Publié, 2006-12
Article révisé par les pairs
| Résumé : | 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. |
