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Effect of sigma(600)-Production in ppbar to 3pi0 at rest

Muneyuki Ishida, Toshihiko Komada, Shin Ishida, Taku Ishida, Kunio Takamatsu, Tsuneaki Tsuru

hep-pharXiv:hep-ph/9910248

Abstract

The pi0 pi0 mass spectra and angular distributions around KKbar-threshold and at 1.5 GeV in ppbar(at rest) to 3pi0 in the Crystal Barrel experiment are reanalyzed by applying the new method, which is consistent with unitarity of S-matrix and expressed directly by resonance parameters. The effects of light sigma-meson production are clearly seen to improve the fit with sigma, in comparing with the fit without sigma.

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