Power suppressed operators and gauge invariance in soft-collinear effective theory

Christian W. Bauer, Dan Pirjol, Iain W. Stewart

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62 Scopus citations

Abstract

The form of collinear gauge invariance for power suppressed operators in the soft-collinear effective theory (SCET) is discussed. Using a field redefinition we show that it is possible to make any power suppressed ultrasoft-collinear operators invariant under the original leading order gauge transformations. Our manipulations avoid gauge fixing. The Lagrangians to script O sign(λ2) are given in terms of these new fields. We then give a simple procedure for constructing power suppressed soft-collinear operators in SCETII by using an intermediate theory SCETI.

Original languageEnglish
Article number034021
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume68
Issue number3
DOIs
StatePublished - 2003

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