External operators and anomalous dimensions in soft-collinear effective theory

被引：30

作者：

Becher, T ^{[1
]}

Hill, RJ

Lange, BO

Neubert, M

机构：

[1] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[2] Cornell Univ, Inst High Energy Phenomenol, Newman Lab Elementary Particle Phys, Ithaca, NY 14853 USA

来源：

PHYSICAL REVIEW D | 2004年 / 69卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.69.034013

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It has recently been argued that soft-collinear effective theory for processes involving both soft and collinear partons contains a new soft-collinear mode, which can communicate between the soft and collinear sectors of the theory. The formalism incorporating the corresponding fields into the effective Lagrangian is extended to include external current and four-quark operators relevant to weak interactions. An explicit calculation of the anomalous dimensions of these operators reveals that soft-collinear modes are necessary to correctly extract the ultraviolet behavior of the effective theory.

引用

页数：9

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