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arXiv 1708.00142hep-phhep-exhep-lat
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三重$QQ\bar Q\bar q$四夸克态

Triply heavy $QQ\bar Q\bar q$ tetraquark states

Jin-Feng Jiang, Wei Chen, Shi-Lin Zhu

摘要:

在QCD求和规则的框架下,我们研究了含有三个重夸克的四夸克态。系统地构造了量子数为$J^{P}=0^{+}$和$J^{P}=1^{+}$的可能的$cc\bar{c}\bar{q}$、$cc\bar{b}\bar{q}$、$bc\bar{b}\bar{q}$、$bb\bar{b}\bar{q}$四夸克态的内插电流.利用这些内插流,我们计算了上述四夸克态的两点关联函数,并提取了它们的质量谱。我们还讨论了这些四夸克态的衰变模式,注意到由于它们的质量谱,$cc\bar{c}\bar{q}$,$cc\bar{b}\bar{q}$,$bc\bar{b}\bar{q}$可能衰变得很快,但衰变宽度很窄。$bb\bar{b}\bar{q}$四夸克预计是非常窄的共振,因为它们的OZI允许的衰变模式是运动学禁止的。这些状态可以用一个$B$介子加一个轻介子或光子在最终状态中搜索。

英文摘要:

Within the framework of QCD sum rules, we have investigated the tetraquark states with three heavy quarks. We systematically construct the interpolating currents for the possible $cc\bar{c}\bar{q}$, $cc\bar{b}\bar{q}$, $bc\bar{b}\bar{q}$, $bb\bar{b}\bar{q}$ tetraquark states with quantum numbers $J^{P}=0^{+}$ and $J^{P}=1^{+}$. Using these interpolating currents, we have calculated the two-point correlation functions and extracted the mass spectra for the above tetraquark states. We also discuss the decay patterns of these tetraquarks, and notice that the $cc\bar{c}\bar{q}$, $cc\bar{b}\bar{q}$, $bc\bar{b}\bar{q}$ may decay quickly with a narrow width due to their mass spectra. The $bb\bar{b}\bar{q}$ tetraquarks are expected to be very narrow resonances since their OZI-allowed decay modes are kinematically forbidden. These states may be searched for in the final states with a $B$ meson plus a light meson or photon.

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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