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

D. Alde, F. Binon, A. M. Blick, C. Bricman, M. Boutemeur, A. V. Dolgopolov, S. V. Donskov, M. Gouanère, S. Inaba, A. V. Inyakin, G. V. Khaustov, T. Kinashi, M. Kobayashi, V. N. Kolosov, A. A. Kondashov, A. A. Lednev, Yu V. Mikhailov, T. Nakagawa, T. Nakamura, J. P. PeigneuxS. A. Polovnikov, V. A. Polyakov, Yu D. Prokoshkin, V. D. Samoylenko, P. M. Shagin, H. Shimizu, A. V. Singovsky, A. E. Sobol, J. P. Stroot, V. P. Sugonyaev, K. Takamatsu, Ts Tsuru, Y. Yasu

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17 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)421-434
Number of pages14
JournalPhysics of Atomic Nuclei
Issue number3
Publication statusPublished - 1999 Mar
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics


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