强子非微扰结构与强子物理过程的唯象研究

Research on nonperturbative structure of hadrons and phyiscal processes involving hadrons has been an important area in particle physics and is essential to understand nonperturbative strong interation and search for new physics. Currently, LHC and BEPC-II have been in operation, CP violation in heavy quark system has been observed, more data on heavy and light hadrons have been accumulated, and more hadronic states and possible exotic hadronic states have been observed. All these make this area even more active. In this project, based on the series of our previous works, we will systematically study some hot topics in the area of nonperturbative structure of hadrons and phyiscal processes involving hadrons. We will apply the Bethe-Salpeter equation and the potential model to study the properties of ground and excited states of heavy baryons which include one, two, and three heavy quarks，respectively, and the peroperties of light baryons (like the proton, the neutron, and Lambda); We will study QCD factorization in heavy baryon nonleptonic decays and CP violation in decays of heavy hadrons in order to provide theoretical support for LHC and BEPC experiments; We will study the properties and structurs of heavy and light diquarks; We will study the possibilities and properties of hadronic molecular states and 4-quark states; We will study the methods of chiral extrapolation of the lattice data (including the data for heavy and light hadron masses, hadronic matrices, and parameters in chiral pertubation theory) to the physical region.

关于强子的非微扰结构与强子参与的物理过程的唯象研究一直是粒子物理中的重要领域，对认识非微扰强相互作用和探索新物理有重要意义。特别是目前LHC和BEPC-II等加速器的运行、重夸克系统CP破缺的发现、重味与轻味强子数据的更多积累、以及更多强子态和可能的奇异强子态的发现，使这一领域更加活跃。本项目将在原有一系列工作的基础上，系统研究该领域中的一些热门课题：运用Bethe-Salpeter方程和势模型研究含一个、两个及三个重夸克的重子和轻重子（如质子、中子和Lambda等粒子）基态和激发态的性质；研究重味重子非轻子衰变中的QCD因子化问题；给出重味强子衰变中CP破缺的预言，为LHC和BEPC等实验提供理论支持；研究重的和轻的diquark的结构和性质；研究各种强子分子态和4夸克态存在的可能性及性质；研究强子格点数据（包括重的和轻的强子质量、强子矩阵元、手征微扰论耦合参数等数据）的解析延拓方案。

关于强子的非微扰结构与强子参与的物理过程的唯象研究一直是粒子物理中的重要领域，对认识非微扰强相互作用和探索新物理有重要意义。近年来LHC和BEPC-II等加速器的运行、重夸克系统CP破缺的发现、重味与轻味强子数据的更多积累、以及更多强子态和可能的奇异强子态的发现，使这一领域更加活跃。本项目在原有一系列工作的基础上，系统研究了该领域中的一些热门课题：运用Bethe-Salpeter方程研究了重味重子和轻重子的性质，与实验结果进行了对比；研究了B介子、D介子、Λ_b重子和τ±轻子等衰变中的CP破缺，为LHC和BEPC等实验提供理论支持；研究了含两个和三个重夸克重味重子性质；研究了各种强子分子态和多夸克态存在的可能性及性质；研究了强子矩阵元格点数据的解析延拓方案。本项目研究理论和实验紧密结合，对实验有指导意义。