Subleading collinear operators and their matrix elements

被引：22

作者：

Hardmeier, A ^{[1
]}

Lunghi, E

Pirjol, D

Wyler, D

机构：

[1] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland

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

来源：

NUCLEAR PHYSICS B | 2004年 / 682卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.nuclphysb.2004.01.022

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We discuss the most general form of the leading power suppressed collinear operators in the softcollinear effective theory. Such operators appear in the description of power corrections to exclusive heavy flavor decays into energetic light hadrons. Reparameterization invariance in the SCET provides powerful constraints on the Wilson coefficients of the subleading collinear operators. We present explicit results for the matrix elements of these operators on pseudoscalar and vector mesons, which are expressed in terms of twist-2 and twist-3 light-cone wave functions. We consistently include the effects of three-particle light-cone distribution amplitudes and find that their impact could be of phenomenological relevance. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：150 / 182

页数：33

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