New results on meson spectroscopy at KEK are presented. Experimental data on the reaction π-p→ηπ-p at 6.3 GeV/c have been collected by the Benkei spectrometer at the 12 GeV proton synchrotron to the aim of searching for IJ PC=11-+ states in the ηπ- system. A marked forward-backward asymmetry of the events is observed in the Gotffired-Jackson frame of the ηπ- system. The result of the partial-wave analysis shows a clear bump of the P + wave around 1320 MeV/c2. Checks for the result and the analysis are discussed.
- Conference proceedings
- Mesons and meson resonances
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics
- Astronomy and Astrophysics