关于协变量子化QCD和QED中动量和angular momentum中辅助场的作用
On the role of the subsidiary fields in the momentum and angular momentum in covariantly quantized QED and QCD
摘要：
QED和QCD的协变量子化需要引入辅助规范固定场和鬼场，理解它们在能量-动量张量、动量和角动量算符中的作用至关重要。这些问题在\cite{Leader:2011za}中进行了研究，该研究的关键结果被用于\cite{Leader:2013jra}中角动量的主要综述。达姆斯基\cite{Damski:2021feu}正确地批评了不正确的推导某些方程在\cite{Leader:2011za}。然而，我们发现，\cite{Leader:2011za}中使用的\cite{Leader:2013jra}的关键结果是不受Damski的批评。
英文摘要：
The covariant quantization of QED and QCD requires the introduction of subsidiary gauge-fixing and ghost fields and it is crucial to understand the role of these in the energy-momentum tensor, and in the momentum and angular momentum operators. These issues were studied in \cite{Leader:2011za}, and key results from this study were utilized in the major review of angular momentum in \cite{Leader:2013jra}. Damski \cite{Damski:2021feu} has rightly criticized as incorrect the derivation of certain equations in \cite{Leader:2011za}. We show, however, that the key results of \cite{Leader:2011za} which are utilized in \cite{Leader:2013jra} are unaffected by Damski's criticism.
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