TY - JOUR
T1 - Power suppressed operators and gauge invariance in soft-collinear effective theory
AU - Bauer, Christian W.
AU - Pirjol, Dan
AU - Stewart, Iain W.
PY - 2003
Y1 - 2003
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0141564938&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0141564938&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.68.034021
DO - 10.1103/PhysRevD.68.034021
M3 - Article
AN - SCOPUS:0141564938
SN - 0556-2821
VL - 68
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 3
M1 - 034021
ER -