Phys. Rev. D 96, 065023 (2017) arXiv link
Note on asymptotic symmetries and soft gluon theorems
Pujian Mao1 and Jun-Bao Wu2,3,4
1 Institute of High Energy Physics and Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, People’s Republic of China
2 School of Science, Tianjin University, 92 Weijin Road, Tianjin 300072, People’s Republic of China
3 School of Physics and Nuclear Energy Engineering, Beihang University, 37 Xueyuan Road, Beijing 100191, People’s Republic of China
4 Center for High Energy Physics, Peking University, 5 Yiheyuan Road, Beijing 100871, People’s Republic of China
P. Mao (Email: maopj@ihep.ac.cn)
J.-B. Wu (Email: junbao.wu@tju.edu.cn )
Abstract
Recently, the leading soft gluon theorem with single soft emission was shown to be the Ward identity of a two-dimensional G-Kac-Moody symmetry. In this paper, we show that the leading soft gluon theorem can be interpreted as the Ward identity for the asymptotic symmetries of non-Abelian gauge theory. We further argue that the subleading soft gluon theorem can follow from the same symmetry.
