高桡度(Higher-Twist)算符和量子色动力学因子化

量子色动力学因子化是利用微扰论处理强子高能散射的有力工具。利用量子色动力学因子化的结果bing结合高能散射的实验结果，人们可以探索强子内部结构并对散射做出具体的理论预言。在过去，由于加速器亮度的限制，因子化的研究和实验研究主要局限于领头幂次，其中涉及的强子部分子分布函数是由twist-2算符定义的。在次领头幂次阶因子化中，涉及的部分子分布函数是由twist-3或higher-twist算符定义。这些部分子分布函数包含了更多的关于强子内部的信息。随着实验的进展和在将来的实验，研究次幂次阶的物理效应和higher-twist部分子分布函数成为了可能。我们拟对这些higher-twist部分子分布函数以及说涉及的因子化问题开展研究。另外，针对计划建造的Eic和EicC电子-离子加速器上靶碎裂区域的物理现象以及涉及的另外一类部分子分布函数(parton fracture function)开展研究

Quantum chromodynamic factorization is a powerful tool for studying hadron high energy scattering by using perturbation theory. From the results of factorizations combined with the experimental results of high-energy scattering, one can explore the internal structure of hadrons and make specific theoretical predictions of scattering. In the past, due to the limitation of accelerator luminosity, study of QCD factorizations and relevant experiments were mainly limited to those at leading powers, and the parton distributions of a hadron involved are defined by the twist-2 operator. In subleading power order factorization, parton distributions involved are defined by the twist-3 or higher-twist operators. These parton distributions contain more information about the inside of hadrons. With the progress of the experiment and future experiments, it becomes possible to study the physical effects of the next-to-leading power order and higher-twist parton distributions. We intend to conduct research on higher-twist parton distributions and the factorization issues involved. In addition, research will be conducted on the physical phenomena of the target fragmentation region on the planned Eic and EicC electron-ion accelerators, where another type of parton fracture function involved.