Masses of doubly heavy tetraquarks T-QQ ' in a relativized quark model
Masses of doubly heavy tetraquarks T-QQ ' in a relativized quark model
复制标题
相对化夸克模型中的双重四夸克质量 TQQ'
DOI：
10.1103/physrevd.102.034012
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Dong Yu-Bing
中科院分区：
文献类型：
--
作者：
Lu Qi-Fang;Chen Dian-Yong;Dong Yu-Bing
本文在相对论化夸克模型中系统地研究了二重四夸克态的质量谱。在变分法中求解了包含库仑势、禁闭势、自旋-自旋相互作用和相对论修正的四体系统。结果表明，该态比相关阈值低54 MeV，说明强衰变和电磁衰变都是被禁止的，因此该态是稳定的。它的大的隐色分量和小的均方根半径表明它是一个紧凑的四夸克态，而不是一个松散束缚的分子或点状双夸克-反双夸克结构。我们对双重重四夸克态的预测可能为未来的实验研究提供有价值的信息。
In the present work, the mass spectra of doubly heavy tetraquarksare systematically investigated in a relativized quark model. The four-body systems including the Coulomb potential, confining potential, spin-spin interactions, and relativistic corrections are solved within the variational method. Our results suggest that thestate is 54 MeV below the relevantthresholds, which indicates that both strong and electromagnetic decays are forbidden, and thus this state can be a stable one. Its large hidden color component and small root mean square radius demonstrate that it is a compact tetraquark rather than a loosely bound molecule or pointlike diquark-antidiquark structure. Our predictions of the doubly heavy tetraquarks may provide valuable information for future experimental searches.