注14: 原文是:I wish I had not caused you and Sudarshan such discomfort. At any opportunity I shall try to set the record straight—but nobody believes me when I am serious. See Mehra，1994，477-478.
规范场论（英语：gauge theory）是基于对称变换可以局部也可以全局地施行这一思想的一类物理理论。规范场论可分为阿贝尔规范场论和非阿贝尔规范场论。非阿贝尔群（非交换对称群）的规范场论最常见的例子为杨-米尔斯理论。
Measurement of the e+e- -> pi+ pi- cross section between 600 and 900MeV using initial state radiation， BESIII Collaboration， Phys.Lett.B 753 629-638， Phys.Lett.B 812 135982。
