Higher twist distribution amplitudes of the nucleon in QCD

被引：133

作者：

Braun, V ^{[1
]}

Fries, RJ ^{[1
]}

Mahnke, N ^{[1
]}

Stein, E ^{[1
]}

机构：

[1] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

来源：

NUCLEAR PHYSICS B | 2000年 / 589卷 / 1-2期

关键词：

QCD; nucleon; power corrections; distribution amplitudes;

D O I：

10.1016/S0550-3213(00)00516-2

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 present the first systematic study of higher-twist light-cone distribution amplitudes of the nucleon in QCD. We find that the valence three-quark state is described at small transverse separations by eight independent distribution amplitudes. One of them is leading twist-3, three distributions are twist-4 and twist-5, respectively, and one is twist-6. A complete set of distribution amplitudes is constructed, which satisfies equations of motion and constraints that follow from conformal expansion. Nonperturbative input parameters are estimated from QCD sum rules. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：381 / 409

页数：29

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