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.
|Number of pages||14|
|Journal||Physics of Atomic Nuclei|
|Publication status||Published - 1999 Mar|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics