Dalitz plot analysis of the decay ω → π+ π- π0
Dalitz plot analysis of the decay ω → π+ π- π0
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DOI：
10.1103/physrevd.98.112007
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发表时间：
2018-12-18
影响因子：
5
通讯作者：
Zou, J. H.
中科院分区：
文献类型：
--
作者：
Ablikim, M.;Achasov, M. N.;Zou, J. H.
使用2.6 x 10（5）J/psi -> omega eta（omega -> pi（+）pi（-）pi（0），eta -> gamma gamma）事件的低背景样本，比以前的实验大约大5倍的统计数据，我们提出了衰减omega -> pi（+）pi（-）pi（0）的Dalitz图分析。结果发现，Dalitz图分布不同于纯P波相空间的统计显著性为18.9西格玛。数据拟合的参数与色散框架内没有交叉通道效应的参数合理一致，这表明omega -> pi（+）pi（-）pi（0）中的交叉通道效应不显著。
Using a low-background sample of 2.6 x 10(5) J/psi -> omega eta(omega -> pi(+) pi(-) pi(0), eta -> gamma gamma) events, about 5 times larger statistics than previous experiments, we present a Dalitz plot analysis of the decay omega -> pi(+) pi(-) pi(0). It is found that the Dalitz plot distribution differs from the pure P-wave phase space with a statistical significance of 18.9 sigma. The parameters from the fit to data are in reasonable agreement with those without the cross-channel effect within the dispersive framework, which indicates that the cross-channel effect in omega -> pi(+) pi(-) pi(0) is not significant.