AI 中文总结
研究在$ψ(4660)$衰变中几种隐藏魅奇异候选物的产生，将$ψ(4660)$视为传统粲偶素态，通过中间粲介子三角圈及夸克模型估计耦合，在统一框架下分析相关过程，预测分支比并发现部分圈贡献主导，为探测隐藏魅态分子性质及机制提供平台。
AI 中文摘要
我们研究了几种隐藏魅奇异候选物，包括 $Z_c(3900)$、$Z_c(4020)$、$Z_{cs}(3985)$ 和 $Z_2(4250)$ 在 $ψ(4660)$ 衰变中的产生情况，假设这些态主要是强子分子。将 $ψ(4660)$ 视为传统的 $ψ(5S)$ 粲偶素态，通过中间粲介子三角圈描述产生机制，并在夸克模型内估计其与粲介子对的耦合。在统一框架下对 $ψ(4660)\to Z_c(3900)\pi$、$ψ(4660)\to Z_c(4020)\pi$、$ψ(4660)\to Z_{cs}(3985)K$ 和 $ψ(4660)\to Z_2(4250)\pi$ 过程进行系统分析。预测的分支比分别约为 $10^{-2}$、$10^{-4}$、$10^{-3}$ 和 $10^{-6}$，对截止参数依赖性较小。还发现多数通道中 $SHH$ 中间圈的贡献比 $THH$ 和 $HHH$ 圈占主导。此工作中可观的产生率表明 $ψ(4660)$衰变是探测带电隐藏魅奇异态分子性质及检验其产生机制的有前景平台。
英文摘要
We investigate the production of several hidden-charm exotic candidates, including $Z_c(3900)$, $Z_c(4020)$, $Z_{cs}(3985)$, and $Z_2(4250)$, in $ψ(4660)$ decays under the assumption that these states are predominantly hadronic molecules. Treating $ψ(4660)$ as a conventional $ψ(5S)$ charmonium state, the production mechanisms are described through intermediate charmed-meson triangle loops, with its couplings to charmed-meson pairs estimated within the quark model. A systematic analysis of the processes $ψ(4660)\to Z_c(3900)π$, $ψ(4660)\to Z_c(4020)π$, $ψ(4660)\to Z_{cs}(3985)K$, and $ψ(4660)\to Z_2(4250)π$ is performed within a unified framework. The predicted branching fractions are found to be of the order of $10^{-2}$, $10^{-4}$, $10^{-3}$, and $10^{-6}$, respectively, exhibiting only a mild dependence on the cutoff parameter. We further find that the contributions from the $SHH$ intermediate loops dominate over those from the $THH$ and $HHH$ loops in most channels. The sizable production rates obtained in this work indicate that $ψ(4660)$ decays provide a promising platform for probing the molecular nature of charged hidden-charm exotic states and testing their underlying production mechanisms.
Comments13 pages, 8 figures
