重味四夸克奇异态是当前高能粒子物理领域的一个研究热点。2003年Belle实验组才首次发现了重味四夸克奇异态候选者X(3872)，而关于它们的内部结构和非微扰效应，则一直是困扰着重味奇异态研究的关键问题。由于重味奇异态的衰变及质量与其内部结构、非微扰效应紧密相关，因此对它们的研究将是解决上述问题的绝佳手段。当前世界各国实验组如中国BESIII、欧洲LHCb等，都在积极推进重味奇异态的实验研究。理论的研究具有前瞻性，因此预先对重味奇异态衰变及质量的理论研究，不仅可以为实验的搜寻研究提供参考，也会完善重味四夸克奇异态的理解，加深我们对强子物理的认识。本项目拟采用QCD求和规则，并结合SU(3)对称性分析与夸克模型，深入研究重味四夸克奇异态的衰变及质量：1) 计算重味四夸克奇异态的质量谱，探究奇异态的内部结构与衰变方式。2) 讨论重味四夸克奇异态的强、弱衰变过程，理解低能的强子的非微扰性质。

The study of heavy-flavor four-quark exotic states is a hot topic in high energy particle physics. Since Belle collaboration found the first candidate of four-quark exotic state X(3872) in 2003, the structure and non-perturbative effect are always the key issues for the study of the heavy-flavor exotic states. The decays and masses of heavy-flavor exotic states are closely related to their structure and non-perturbative effect, which offer a great way to solve the puzzles above. At present, collaborations around the world, such as BESIII in China and LHCb in Europe, are actively pushing on the study of heavy-flavor exotic states. The theoretical research is prospective. Therefore, the theoretical study of the decays and masses of heavy-flavor exotic states can not only provide a reference for the experimental research, but also develop the understanding of the heavy-flavor four-quark exotic states in theory and give a better insight about the hadron physics. Following the QCD sum rule, combining with SU(3) symmetry analysis and quark model, we will fully study the decays and masses of heavy-flavor four-quark exotic states in the project. 1) Calculating the mass spectrum of heavy-flavor four-quark exotic states, which can explore the structure and decay mode of the exotic states. 2) Disscussing the strong and weak decays of heavy-flavor four-quark exotic states, which are useful to make a thorough study about the low energy heavy hadron physics.