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arXiv 1912.09482hep-thhep-ph
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软共线有效理论:BRST公式

Soft-Collinear Effective Theory: BRST Formulation

Sudhaker Upadhyay, Bhabani Prasad Mandal

摘要:

我们提供了一个系统的BRST形式主义的软共线有效理论描述的软和共线自由度的存在下,硬相互作用的相互作用。特别是,我们开发了完整的BRST对称性变换SCET理论。我们进一步扩展的BRST制定的变换场依赖。当在不同的仪表条件下定义时,这在几个SCET动作之间建立了一致的映射。事实上,一个明确的结构规范固定的行动对应于任何特定的规范条件可以产生SCET理论使用我们的配方。

英文摘要:

We provide a systematic 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 full BRST symmetry transformation for SCET theory. We further extend the BRST formulation by making the transformation 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.

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