par Donskov, Sergey;Inyakin, Alexandre A.V.;Kachanov, Vasilij V.A.;Khaustov, G.;Kolosov, V.;Kondashov, Andrei A.A.;Kulik, Alexei A.V.;Landsberg, Greg G.L.;Lednev, Andrey;Lishin, V.;Polovnikov, Sergey S.A.;Polyakov, V.;Prokoshkin, Yu Y.D.;Sadovsky, Sergey S.A.;Samoylenko, Vladimir;Shagin, Petr P.M.;Shtannikov, A.V. A.V.;Singovsky, Alexandre A.V.;Sobol, Andrei;Sugonyaev, Valentine;Bricman, Charles 
;Stroot, Jean-Pierre ;Gouanère, M.;Peigneux, Jean Pierre;Poulet, Maurice;Alde, D.;Knapp, Edward E.A.;Inaba, Susumu;Kinashi, Tomoko;Kobayashi, Makoto;Takamatsu, Kunio;Tsuru, Tsuneaki;Binon, Freddy ;Nakamura, Teruo;Boutemeur, Madjid
Référence Physics of atomic nuclei, 59, 6, page (982-990)
Publication Publié, 1996-06
;Stroot, Jean-Pierre ;Gouanère, M.;Peigneux, Jean Pierre;Poulet, Maurice;Alde, D.;Knapp, Edward E.A.;Inaba, Susumu;Kinashi, Tomoko;Kobayashi, Makoto;Takamatsu, Kunio;Tsuru, Tsuneaki;Binon, Freddy ;Nakamura, Teruo;Boutemeur, MadjidRéférence Physics of atomic nuclei, 59, 6, page (982-990)
Publication Publié, 1996-06
Article révisé par les pairs
| Résumé : | A mass-independent partial-wave analysis of the reaction π-p → ηπ0n is performed in the ηπ0 mass range above 1.6 GeV. The analysis employs the S, P, D, F, and G waves and is based on experimental data collected with the GAMS-2000 multiphoton spectrometer in a 38-GeV/c pion beam extracted from the 70-GeV accelerator of IHEP. A resonance with quantum numbers JPC = 4++ and IG = 1- is observed in the G wave. Its mass and width are measured to be M = 2010 ± 20 MeV and Γ = 370 ± 80 MeV. The mechanism of the observed a04-meson production is dominated by natural-spin-parity exchange in the t channel. The measured unnaturalto-natural cross-section ratio is 0.60 ± 0.16. |
