On Power Suppressed Operators and Gauge Invariance in SCET
High Energy Physics - Phenomenology
2009-11-10 v3
Abstract
The form of collinear gauge invariance for power suppressed operators in the soft-collinear effective theory 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 O(lambda^2) are given in terms of these new fields. We then give a simple procedure for constructing power suppressed soft-collinear operators in SCET_II by using an intermediate theory SCET_I.
Keywords
Cite
@article{arxiv.hep-ph/0303156,
title = {On Power Suppressed Operators and Gauge Invariance in SCET},
author = {Christian W. Bauer and Dan Pirjol and Iain W. Stewart},
journal= {arXiv preprint arXiv:hep-ph/0303156},
year = {2009}
}
Comments
15 pages, journal version