Soft-collinear effective theory: BRST formulation
Sudhaker Upadhyay, Bhabani Prasad Mandal
European Physical Journal C: Particles and Fields · 2021
doi:10.1140/epjc/s10052-021-09066-z (opens in a new tab)
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Abstract
Abstract 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.
Abstract licence: CC BY
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