摘要
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[D_(s)(*)D_(s)(*)]^(0++),[D_(s)(*)D_(s)(*)]^(1++),and[D_(s)(*)D_(s)(*)]^(1++)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=DD*bound state is supported by its mass and decay branching ratios.The second prerequisite,the existence of the DsDs[D_(s)(*)D_(s)(*)]^(0++)bound state is supported by the lattice QCD calculation and the observation of X_(c0)(3930)by the LHCb Collaboration.We hope the future experimental analyses can search for these bound states in the B→[D_(s)(*)D_(s)(*)]h processes(h denotes the light hadrons).The[D_(s)(*)D_(s)(*)]^(0++)bound state is also expected to be reconstructed in the J/ψФinal state in the B→//ψФK decay.
本文研究了双介子系统中的SU(3)味道对称性,重夸克自旋对称性及它们的破缺效应,进而基于SU(3)味道对称性和重夸克自旋对称下的两个前提证明了[D_(s)(*)D_(s)(*)]^(0++),[D_(s)(*)D_(s)/D_(s)D_(s)(*)]^(1+-)和[D_(s)(*)D_(s)(*)]^(+-)束缚态的存在.第一个前提,X(3872)是D*D/DD*的弱束缚态,可以被它的质量和衰变分支比所支持.第二个前提,存在[DsDs]^(0++)的束缚态,被格点QCD的计算以及LHCb合作组观测到的χ_(c0)(3930)所支持.这些束缚态的预言有望在未来B→D_(s)(*)D_(s)(*)h的实验分析中找到(h代表轻强子).[D_(s)(*)D_(s)(*)]^(0++)束缚态也有望在B→J/ψϕK的衰变J/ψϕ的末态中重建得到.
作者
Lu Meng
Bo Wang
Shi-Lin Zhu
孟璐;王波;朱世琳(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)
基金
This project was supported by the National Nat-ural Science Foundation of China(11975033 and 12070131001)
This project was also funded by the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation,Project ID 196253076-TRR 110).
