Production of 3π^0 and η2π^0 from π^-p Collision in GAMS Experiment(§3. ππ Production Processes,Possible Existence of the σ-Meson and Its Implications to Hadron Physics)

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  • Production of 3π0 and η2π0 from π-p Collision in GAMS Experiment
  • Production of 3 パイ 0 and イータ 2 パイ 0 from パイ p Collision in GAMS Experiment

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The data on the π^-p → M^0n, with M^0 = π^0π^0π^0 orπ^0π^0η obtained in the GAMS experiment may be useful to study the σ(400 〜 700) and a^χ_1(〜1000), which can be taken as chiral partners of π and ρ, respectively. A preliminary analysis for 3π^0 invariant mass spectra gives a support for the assumed a^χ_1 with a mass of 〜 930MeV and Γ 〜 170MeV.

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