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arXiv 2108.02673hep-phhep-exhep-lat
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重-重强子分子综述

A survey of heavy-heavy hadronic molecules

Xiang-Kun Dong, Feng-Kun Guo, Bing-Song Zou

备注：
v3: the published version, mistakes about the quantum numbers of identical di-baryon system corrected and 122 double-charm hadronic molecules; v2: more discussion added and references updated; v1: 20 pages, 6 figures and 124 double-charm hadronic molecules including the recently discovered T_{cc} in LHCb measurement
发表信息：
Commun. Theor. Phys. 73 (2021) 125201
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摘要：

我们在以前的工作中得到了由重-反重粲强子组成的强子分子的谱。势在首阶是常数，由共振饱和估计。强子分子的实验候选者，如$X(3872)$，$Y(4260)$，三个$P_c$态和$P_{cs}(4459)$，都很好地符合谱。描述重-反重强子分子模式的成功激发了我们对重-重强子分子模式给出更多的预言，这在文献中比重-反重强子分子模式讨论得更少。考虑到重-反重强子分子（其中几个有强有力的实验证据）是从共振饱和的主导常数相互作用中产生的，我们发现许多重-重强子分子的存在是自然的。在这些预测的重-重态中，我们重点介绍了$DD^*$分子和$D^{(*)}Σ_c^{(*)}$分子，它们是著名的$X(3872)$和$P_c$态的搭档。最近，LHCb合作报告了一个双魅力四夸克态，$T_{cc}$，这是符合我们的结果为$DD^*$分子。随着这种新的奇异态的第一个实验信号，即将到来的LHCb实验以及其他实验的第三次更新将提供更多的机会来观察重-重强子分子。

英文摘要：

The spectrum of hadronic molecules composed of heavy-antiheavy charmed hadrons has been obtained in our previous work. The potentials are constants at the leading order, which are estimated from resonance saturation. The experimental candidates of hadronic molecules, say $X(3872)$, $Y(4260)$, three $P_c$ states and $P_{cs}(4459)$, fit the spectrum well. The success in describing the pattern of heavy-antiheavy hadronic molecules stimulates us to give more predictions for the heavy-heavy cases, which are less discussed in literature than the heavy-antiheavy ones. Given that the heavy-antiheavy hadronic molecules, several of which have strong experimental evidence, emerge from the dominant constant interaction from resonance saturation, we find that the existence of many heavy-heavy hadronic molecules is natural. Among these predicted heavy-heavy states we highlight the $DD^*$ molecule and the $D^{(*)}Σ_c^{(*)}$ molecules, which are the partners of the famous $X(3872)$ and $P_c$ states. Quite recently, LHCb collaboration reported a doubly charmed tetraquark state, $T_{cc}$, which is in line with our results for the $DD^*$ molecule. With the first experimental signal of this new kind of exotic states, the upcoming 3pdate of the LHCb experiment as well as other experiments will provide more chances of observing the heavy-heavy hadronic molecules.

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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