We provide a BRST formalism for the soft-collinear effective theory describing interactions of soft and collinear degrees of freedom in the presence of a hard interaction. In particular, we develop a BRST symmetry transformation for SCET theory. We further generalize the BRST formulation by making the transformation parameter field dependent. This establishes a mapping between several SCET actions consistently when defined in different gauge conditions. In fact, a definite structure of gauge-fixed actions corresponding to any particular gauge condition can be generated for SCET theory using our formulation.

A preprint version of the article is available at ArXiv.

中文翻译：

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共共线有效理论：BRST公式

我们为软共线有效理论提供了BRST形式主义，该理论描述了在存在硬相互作用的情况下软自由度和共线性自由度之间的相互作用。特别是，我们为SCET理论开发了BRST对称变换。我们通过使变换参数字段相关来进一步概括BRST公式。当在不同的仪表条件下定义时，这将在多个SCET动作之间建立一致的映射。实际上，可以使用我们的公式为SCET理论生成与任何特定仪表条件相对应的仪表固定动作的确定结构。

该文章的预印本可在ArXiv上获得。