Infrared regulators in soft-collinear effective theory

被引：14

作者：

Bauer, CW ^{[1
]}

Dorsten, MP ^{[1
]}

Salem, MP ^{[1
]}

机构：

[1] CALTECH, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW D | 2004年 / 69卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.69.114011

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider matching from SCETI, which includes ultrasoft and collinear particles, onto SCETII with soft and collinear particles at one loop. Keeping the external fermions off their mass shell does not regulate all IR divergences in both theories. We give a new prescription to regulate infrared divergences in SCET. Using this regulator, we show that soft and collinear modes in SCETII are sufficient to reproduce all the infrared divergences of SCETI. We explain the relationship between IR regulators and an additional mode proposed for SCETII.

引用

页数：8

共 13 条

[1] Power suppressed operators and gauge invariance in soft-collinear effective theory [J].