New results on spectroscopy from BENKEI

H. Aoyagi, S. Fukui, T. Hasegawa, N. Hayashi, N. Horikawa, J. Iizuka, S. Inaba, S. Ishimoto, Y. Ishizaki, T. Iwata, E. Kanatani, H. Kawai, T. Kinashi, A. Kishi, K. Kobayashi, Y. Kobayashi, K. Matsuda, T. Matsuda, K. Mori, T. NakagawaS. Nakamura, T. Nakamura, T. Nakanishi, A. Narita, K. Ohmi, C. Ohmori, T. Samoto, H. Shimizu, Y. Tajima, K. Takamatsu, M. Takasaki, T. Tsubaki, K. Tsuchiya, T. Tsuru, I. Yamauchi, Y. Yasu, H. Y. Yoshida, A. Wakai

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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.

Original languageEnglish
Pages (from-to)1925-1939
Number of pages15
JournalIl Nuovo Cimento A
Issue number10
Publication statusPublished - 1994 Oct
Externally publishedYes


  • Conference proceedings
  • Mesons and meson resonances

ASJC Scopus subject areas

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


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