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arXiv 2002.09401hep-ph
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$χ_{\rm c}(3P)$和$X(4274)$共振态的夸克结构及其强衰变和辐射衰变

Quark structure of the $χ_{\rm c}(3P)$ and $X(4274)$ resonances and their strong and radiative decays

J. Ferretti, E. Santopinto, M. Naeem Anwar, Yu Lu

摘要:

在耦合通道模型中,我们计算了具有阈值修正的$χ_{\rm c}(3P)$态的质量。该模型最近被用于描述$χ_{\rm c}(2P)$和$χ_{\rm b}(3P)$多重态的性质[Phys.\ Lett. B { \bf 789},550(2019)]。我们还计算了$χ_{\rm c}(3P)$态及其辐射跃迁的开粲强衰变宽度。根据我们的预测,$χ_{\rm c}(3P)$态应该是由粲偶素核主导的,但它们也可能显示出小的介子-介子成分。$X(4274)$被解释为$c \bar c$ $χ_{\rm c1}(3P)$状态。需要更多关于$χ_{\rm c}(3P)$多重态其他成员的信息,以及对$X(4274)$衰变模式的更严格分析,以提供关于先前共振的夸克结构的进一步指示。

英文摘要:

We calculate the masses of $χ_{\rm c}(3P)$ states with threshold corrections in a coupled-channel model. The model was recently applied to the description of the properties of $χ_{\rm c}(2P)$ and $χ_{\rm b}(3P)$ multiplets [Phys.\ Lett.\ B {\bf 789}, 550 (2019)]. We also compute the open-charm strong decay widths of the $χ_{\rm c}(3P)$ states and their radiative transitions. According to our predictions, the $χ_{\rm c}(3P)$ states should be dominated by the charmonium core, but they may also show small meson-meson components. The $X(4274)$ is interpreted as a $c \bar c$ $χ_{\rm c1}(3P)$ state. More informations on the other members of the $χ_{\rm c}(3P)$ multiplet, as well as a more rigorous analysis of the $X(4274)$'s decay modes, are needed to provide further indications on the quark structure of the previous resonance.

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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