Chinese Physics C> 2004, Vol. 28> Issue(3) : 4-4–10

J/ψ→ωπ~+π~–衰变道中σ粒子存在的证据(英文)

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based on a sample of 7.8×10 6 besi j/ψ events, the decay of j/ψ→ωπ +π – is studied. a low mass enhancement in the π +π – invariant mass spectrum recoiling against ω particle is clearly seen which does not come from the phase space effect and the background. according to PWa analysis, this low mass enhancement is a broad 0 ++ resonance, the σ particle. if a baeit–Winger function of constant width is used to fit the σ signal, its mass and width are 384±66 mev and 458±100 mev respectively, which correspond to the pole position at (434±78)–i(202±43) mev.particle, chiral particles, new resonance, j/ψ decay

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Received: 2003-12-02
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

J/ψ→ωπ~+π~–衰变道中σ粒子存在的证据(英文)

Received Date: 2003-12-02

Accepted Date: 1900-01-01

Available Online: 2004-03-05

Abstract: based on a sample of 7.8×10 6 besi j/ψ events, the decay of j/ψ→ωπ +π – is studied. a low mass enhancement in the π +π – invariant mass spectrum recoiling against ω particle is clearly seen which does not come from the phase space effect and the background. according to PWa analysis, this low mass enhancement is a broad 0 ++ resonance, the σ particle. if a baeit–Winger function of constant width is used to fit the σ signal, its mass and width are 384±66 mev and 458±100 mev respectively, which correspond to the pole position at (434±78)–i(202±43) mev.particle, chiral particles, new resonance, j/ψ decay

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J/ψ→ωπ~+π~–衰变道中σ粒子存在的证据(英文)

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J/ψ→ωπ~+π~–衰变道中σ粒子存在的证据(英文)

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