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arXiv 0902.1300hep-phhep-exnucl-exnucl-th
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对$ψ(3770)$的非$D \bar D$衰变的动力学理解

Towards a dynamical understanding of the non-$D \bar D$ decay of $ψ(3770)$

Yuan-Jiang Zhang, Gang Li, Qiang Zhao

摘要:

在有效拉格朗日理论下,研究了$ψ(3770)$非$D\bar{D}$衰变为$VP$的过程,其中$V$和$P$分别表示矢量和赝标介子.通过识别介子环的跃迁,并利用$ψ(3770)\to J/ψη$、$ϕη$和$ρπ$的实验数据对模型参数进行约束,我们成功地对所有$ψ(3770)\to VP$进行了定量预测,其中$BR_{VP}$的质量分数为0.41%~ 0.64%。这表明OZI规则规避的长程相互作用仍然在$ψ(3770)$强衰变中发挥作用,并可能是全面理解神秘的$ψ(3770)$非$D\bar{D}$衰变机制的关键。

英文摘要:

We investigate the $ψ(3770)$ non-$D\bar{D}$ decays into $VP$, where $V$ and $P$ denote vector and pseudoscalar mesons, respectively, via OZI-rule-evading intermediate meson rescatterings in an effective Lagrangian theory. By identifying the leading meson loop transitions and constraining the model parameters with the available experimental data for $ψ(3770)\to J/ψη$, $ϕη$ and $ρπ$, we succeed in making a quantitative prediction for all $ψ(3770)\to VP$ with $BR_{VP}$ from 0.41% to 0.64%. It indicates that the OZI-rule-evading long-range interactions are still playing a role in $ψ(3770)$ strong decays, and could be a key towards a full understanding of the mysterious $ψ(3770)$ non-$D\bar{D}$ decay mechanism.

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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