Meng Lu, Wang Bo, Zhu Shi-Lin
Ruhr-Universität Bochum, Fakultät für Physik und Astronomie, Institut für Theoretische Physik II, D-44780 Bochum, Germany.
Center of High Energy Physics, Peking University, Beijing 100871, China; School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China.
Sci Bull (Beijing). 2021 Jul 15;66(13):1288-1295. doi: 10.1016/j.scib.2021.03.016. Epub 2021 Mar 19.
In this work, we investigate the SU(3) flavor symmetry, heavy quark spin symmetry and their breaking effects in the di-meson systems. We prove the existence of the [Formula: see text] , [Formula: see text] , and [Formula: see text] bound states as the consequence of two prerequisites in the SU(3) flavor symmetry and heavy quark spin symmetry. The first prerequisite, the X(3872) as the weakly D‾D/D‾D bound state is supported by its mass and decay branching ratios. The second prerequisite, the existence of the [Formula: see text] bound state is supported by the lattice QCD calculation and the observation of χ(3930) by the LHCb Collaboration. We hope the future experimental analyses can search for these bound states in the B→DD‾h processes (h denotes the light hadrons). The [Formula: see text] bound state is also expected to be reconstructed in the J/ψϕ final state in the B→J/ψϕK decay.
在这项工作中，我们研究了SU(3)味对称性、重夸克自旋对称性及其在双介子系统中的破缺效应。我们证明了作为SU(3)味对称性和重夸克自旋对称性中两个前提条件的结果，[公式：见原文]、[公式：见原文]和[公式：见原文]束缚态的存在。第一个前提条件，X(3872)作为弱D‾D/D‾D束缚态，由其质量和衰变分支比所支持。第二个前提条件，[公式：见原文]束缚态的存在由格点量子色动力学计算以及LHCb合作组对χ(3930)的观测所支持。我们希望未来的实验分析能够在B→DD‾h过程（h表示轻强子）中寻找这些束缚态。[公式：见原文]束缚态也有望在B→J/ψϕK衰变的J/ψϕ末态中被重建。
