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Study of the reaction π-p → ηπ0n at 32, 38, and 100 GeV/c

par Blick, A.M. A.M.;Dolgopolov, A.V. A.V.;Donskov, Sergey;Inyakin, Alexandre A.V.;Khaustov, G.;Kolosov, V.;Kondashov, Andrei A.A.;Lednev, Andrey;Mikhailov, Yu;Polovnikov, Sergey S.A.;Polyakov, V.;Prokoshkin, Yu Y.D.;Samoylenko, Vladimir;Shagin, Petr P.M.;Singovsky, Alexandre A.V.;Sobol, Andrei;Sugonyaev, Valentine;Binon, Freddy ;Bricman, Charles ;Stroot, Jean-Pierre ;Gouanère, M.;Peigneux, Jean Pierre;Alde, D.;Inaba, Susumu;Kobayashi, Makoto;Tsuru, Tsuneaki;Yasu, Yasushi;Boutemeur, Madjid;Kinashi, Tomoko;Shimizu, Hiroshi;Nakagawa, Takemi;Nakamura, Teruo;Takamatsu, Kunio
Référence Physics of atomic nuclei, 62, 3, page (421-434)
Publication Publié, 1999-03

Article révisé par les pairs

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Résumé :

The reaction π-p → ηπ0n at primary π- meson momenta of 32, 38, and 100 GeV/c has been studied by using the GAMS facilities. A partial-wave analysis has been performed in the effective-mass range 0.77 ≤ Mηπ0 < 182 GeV/c2. A peak associated with the a2 meson is clearly seen in the D+-wave. The difference of the D+-and P+-wave phases changes abruptly in the region of the a2 mass. A significant contribution of the P+ wave is observed at the a2-mass value and above, but this wave does not show a clear-cut resonance behavior. No significant contribution from exchanges of unnatural spin-parity are observed with the exception of the S-wave contribution in the region of the a0 mass and the D0-wave contribution in the region of the a2 mass.