Perturbative QCD Study for Jet and Heavy Flavor Production

该奖项资助了加州大学洛杉矶分校康中波教授的研究活动。经过近20年的规划和建设，大型强子对撞机(LHC)现在是世界上能量最高的粒子对撞机。通过基本粒子在高能下相互碰撞，物理学家希望了解物质的基本组成部分，以及它们在比以往任何时候都更高的能量和更短的距离上的相互作用。强子的准直喷流是高能粒子相互作用的主要特征，在大型强子对撞机上大量产生。康教授的研究重点是了解这些强相互作用粒子的产生，从中可以提取重要信息。喷流为探索强相互作用的动力学和研究基本理论--量子色动力学(QCD)提供了独特的机会。因此，这一领域的研究通过促进科学最基本的方向之一--发现和理解新的物理定律--来促进国家利益。预计该项目还将产生更广泛的重大影响。康教授将让研究生参与他的研究，从而为开始这一领域研究的初级物理学家提供关键培训。他还打算就他的研究成果进行公开讲座，并在LHC成果的基础上开发新的课程。更严格地说，康教授将开发理论工具，在LHC上进行准确的QCD现象学研究，特别是关于包容性和重味道标记喷流及其亚结构。他还将利用QCD因式分解中的一种新的碎裂函数方法，对重夸克生产进行研究。此外，他将结合重夸克物理和喷射子结构的框架，以便更好地了解大型强子对撞机上重夸克的产生和极化，这是目前该领域最耐人寻味的谜题之一。

This award funds the research activities of Professor Zhongbo Kang at the University of California, Los Angeles.After nearly twenty years of planning and construction, the Large Hadron Collider (LHC) is now the highest-energy particle collider in the world. By colliding elementary particles against each other at high energies, physicists expect to learn about the fundamental building blocks of matter and their interactions at higher energies and smaller distances than have ever been previously explored. Collimated jets of hadrons are a dominant feature of high-energy particle interactions, and are copiously produced at the LHC. The research of Professor Kang is focused on understanding the production of these strongly interacting particles, from which important information can be extracted. Jets constitute unique opportunities to explore the dynamics of the strong interaction and to study the fundamental properties of the underlying theory, Quantum Chromodynamics (QCD). As a result, research in this area advances the national interest by promoting the progress of science in one of its most fundamental directions: the discovery and understanding of new physical law. This project is also envisioned to have significant broader impacts. Professor Kang will involve graduate students in his research, and thereby provide critical training for junior physicists beginning research in this field. He also intends to give public lectures on his research results, and develop new course curricula based on results from the LHC.More technically, Professor Kang will develop theoretical tools to perform accurate QCD phenomenology at the LHC, especially for inclusive and heavy flavor tagged jets and their substructure. He will also perform studies for heavy quarkonium production by making use of a novel fragmentation function approach within QCD factorization. In addition, he will combine the frameworks of heavy quarkonium physics and jet substructure in order to achieve a better understanding of the production and polarization of heavy quarkonium at the LHC, which is currently one of the most intriguing puzzles in the field.