Power counting in the soft-collinear effective theory

被引：42

作者：

Bauer, CW ^{[1
]}

Pirjol, D

Stewart, IW

机构：

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

[2] Univ Washington, Inst Nucl Theory, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW D | 2002年 / 66卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.66.054005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We describe in some detail the derivation of a power counting formula for the soft-collinear effective theory (SCET). This formula constrains which operators are required to correctly describe the infrared at any order in the Lambda(QCD)/Q expansion (lambda expansion). The result assigns a unique lambda dimension to SCET graphs solely from vertices, is gauge independent, and can be applied independent of the process. For processes with an OPE the lambda dimension has a correspondence with a dynamical twist.

引用

页数：7

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