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arXiv 1002.1535hep-ph
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$η'\to3π^{0},π^{0}π^{+}π^{-}$衰变中的标量介子

Scalar mesons in $η'\to3π^{0},π^{0}π^{+}π^{-}$ decays

A. K. Likhoded, A. V. Luchinsky, V. D. Samoylenko

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10 pages, 6 figures
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摘要：

在等压线模型方法中考虑了$η'\to3π^{0}$和$π^{0}π^{+}π^{-}$衰变。衰变$η'\to3π^{0}$的分支比和Dalitz图的形状可以用$a0$和$σ$介子的贡献来解释。在Dalitz图分布重构中需要引入$σ$介子项。衰变$η'\to π^{0}π^{+}π^{-}$的分支比可以在相同的同量异位素框架中计算。这种衰变的达利兹图的预测强烈依赖于模型参数。

英文摘要：

The decays $η'\to3π^{0}$ and $π^{0}π^{+}π^{-}$ were consider in isobar model approach. Branching ratio and Dalitz-plot shape of the decay $η'\to3π^{0}$ can be explain by $a0$- and $σ$-meson contributions. The $σ$ meson term is needed for the Dalitz-plot distribution reconstruction. The branching ratio of the decay $η'\to π^{0}π^{+}π^{-}$ can be calculated in the same isobar framework. The prediction for the Dalitz-plot of this decay is shown which strongly dependents from model parameters.

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