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

被引：61

作者：

Bauer, CW ^{[1
]}

Pirjol, D

Stewart, IW

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[3] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW D | 2003年 / 68卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.68.034021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 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 SCETII by using an intermediate theory SCETI.

引用

页数：10

共 30 条

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