Invariant operators in collinear effective theory

被引：678

作者：

Bauer, CW ^{[1
]}

Stewart, IW ^{[1
]}

机构：

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

来源：

PHYSICS LETTERS B | 2001年 / 516卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/S0370-2693(01)00902-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider processes which produce final state hadrons whose energy is much greater than their mass. In this limit interactions involving collinear fermions and gluons are constrained by a symmetry, and we give a general set of rules for constructing leading and subleading invariant operators. Wilson coefficients C(mu, (P) over bar) are functions of a label operator (P) over bar, and do not commute with collinear fields. The symmetry is used to reproduce a two-loop result for factorization in B --> D pi in a simple way. (C) 2001 Published by Elsevier Science B.V.

引用

页码：134 / 142

页数：9

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