粲味粒子弱衰变的唯象与格点研究

粲物理是当今粒子物理中国际上理论和实验研究的重大前沿课题之一。粲味介子与重子弱衰变尤其是稀有衰变是测量标准模型中夸克混合矩阵元(CKM)、探寻电荷共轭-宇称联合变换(CP)对称性破坏机制、检验电弱标准模型与寻找新物理的理想场所。针对粲味粒子弱衰变中存在的一些基本问题，本项目拟采用唯象手段(包含SU(3)对称性、算符乘积展开、非微扰夸克模型与QCD求和规则)与格点模拟，研究重味强子包含重味介子与重味重子与Xic的弱衰变，包含弱衰变形状因子与弱衰变寿命矩阵元等，以期结合BESIII等国际实验，共同推进对粲味强子弱衰变的认识。

Weak decays of charmed hadrons play a vital role in testing the standard model of particle physics, and hunting for new physics beyond the SM. This research project aims to establish some effective/reliable theoretical methods to analyze the weak decays of charmed mesons and hadrons. We propose to use the flavor SU(3) symmetry, and phenomenological methods and analyze semileptonic and some nonleptonic decays. Some popular new physics contributions will be analyzed. This project will also focus on the Lattice QCD simulation of weak decay form factors and the matrix elements for the lifetimes of Lambda_c and Xi_{c} baryons. We expect that together with the BESIII experimentalists, this project can deepen our understanding of charmed mesons and charmed baryons.