高能对撞机上双重味强子产生机制高阶圈图效应的探讨

高能对撞机上双重味强子（双重味介子及双重味重子）高阶圈图效应的探讨无论是对我们进一步阐明双重味强子产生机制，还是深入理解QCD理论都有着极其重要的意义。高阶圈图效应的研究涉及微扰QCD高阶修正的计算、重整化能标及方案依赖性的消除等问题，目前仍然是国际上没有很好解决的问题。本项目将重点对双重味强子产生的高阶圈图效应进行系统、深入的研究，尝试建立完整、切实可行的计算、处理双重味强子产生过程高阶修正的理论方法，借助最大共形原理（PMC）有效减小重整化能标及方案引起的理论不确定性，详细探讨QCD高阶贡献对总产生截面、各种微分分布行为以及重夸克偶素的极化产生行为等的影响。并尝试利用获得的高阶信息解决LHC及Tevatron上重夸克偶素产生的各种疑难问题，给出拟建的CEPC-SPPC、LHeC等高能对撞机上包含高阶效应的双重味强子产生理论预言，为拟建的高能对撞机提供更加全面、准确的理论参考和依据。

Study on the effects from high-order loop diagrams is very important not only for clarifying the production mechanism of doubly heavy hadron in high energy colliders, but also for understanding the Quantum Chromodynamics (QCD) theory. Investigation of the contribution from loop diagram involves the calculation of QCD corrections and eliminating dependency of renormalization scale and scheme. These are the problems, to our best knowledge, which remains to be resolved. This project aims at studying the effects from high order loop diagrams systematically, and trying to provide a feasible way to calculate the high order QCD corrections of doubly heavy hadron production. Meanwhile, we'll use the Principle of Maximum Conformality (PMC) to reduce theoretical uncertainty from renormalization scale and scheme. We'll make great efforts to reveal that how the production behavior, such as differential distributions and polarized production, is influenced by the contributions from loop diagrams. With information of high order corrections, we also wanna try to resolve the heavy quarkonium production puzzles in the hadron colliders. Moreover, theoretical predictions will be provided for the future colliders, such as CEPC-SPPC and LHeC.