Soft-collinear effective theory: BRST formulation

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作者：
Sudhaker Upadhyay
Bhabani Prasad Mandal
机构：
[1] K.L.S. College (a constituent unit of Magadh University,Department of Physics
[2] Bodh-Gaya),School of Physics
[3] Visiting Associate,Department of Physics, Institute of Science
[4] Inter-University Centre for Astronomy and Astrophysics (IUCAA),undefined
[5] Damghan University,undefined
[6] Banaras Hindu University,undefined
来源：
The European Physical Journal C | 2021年 / 81卷
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摘要：
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.
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