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arXiv 0905.1637hep-ph
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通过$D\bar D$不变质谱和$ψ(3770)$的辐射衰变测试预测的动态生成的隐魅$X$标量态

Testing the predicted dynamically generated hidden charm $X$ scalar state through the $D\bar D$ invariant mass spectrum and the radiative decay of the $ψ(3770)$

D. Gamermann, E. Oset, B. S. Zou

摘要:

在这项工作中,我们提出了我们的模型,动态产生共振的魅力和轻的赝标量和矢量介子。该模型产生了丰富的频谱的魅力和隐藏的魅力标量和轴向共振,其中大部分可以与观察到的状态。其他国家的预测,特别是一个隐藏的魅力标量共振质量接近$D\bar D$阈值。对于这种共振,我们提出的计算表明,观察到的增强在$D\bar D$质谱测定贝尔在反应中产生$D\bar D J/ψ$在最终状态可以起源于这个预测的状态。我们还提出了理论计算的辐射衰减宽度的$ψ(3770)$到这个状态。预测的分支分数表明,这种预测的状态可以观察到的BES在$ψ(3770)$峰运行一年的统计。

英文摘要:

In this work we present our model that dynamically generates resonances from charmed and light pseudoscalar and vector mesons. The model generates a rich spectrum of charmed and hidden charm scalar and axial resonances, most of them which can be associated with observed states. Other states are predicted, in particular a hidden charm scalar resonance with mass close to the $D\bar D$ threshold. For this resonance we present calculations which show that an observed enhancement in the $D\bar D$ mass spectrum measured by Belle in reactions producing $D\bar D J/ψ$ in the final state could be originated by this predicted state. We also present theoretical calculations on the radiative decay width of the $ψ(3770)$ into this state. The predicted branching fractions suggest that this predicted state could be observed by BES with statistics of one year run in the $ψ(3770)$ peak.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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