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 are given in terms of these new fields. We then give a simple procedure for constructing power suppressed soft-collinear operators in by using an intermediate theory
- Received 21 April 2003
DOI:https://doi.org/10.1103/PhysRevD.68.034021
©2003 American Physical Society