On the description of exclusive processes beyond the leading twist approximation

被引：26

作者：

Anikin, I. V. ^{[2
]}

Ivanov, D. Yu ^{[3
]}

Pire, B. ^{[1
]}

Szymanowski, L. ^{[4
]}

Wallon, S. ^{[5
,6
]}

机构：

[1] Ecole Polytech, CNRS, CPhT, F-91128 Palaiseau, France

[2] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia

[3] Russian Acad Sci, Inst Math, Novosibirsk 630090, Russia

[4] Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland

[5] Univ Orsay, LPT, CNRS, F-91404 Orsay, France

[6] Univ Paris 06, UPMC, Fac Phys, F-75252 Paris 05, France

来源：

PHYSICS LETTERS B | 2010年 / 682卷 / 4-5期

关键词：

DISTRIBUTION AMPLITUDES; ELECTROPRODUCTION; MESONS; QCD;

D O I：

10.1016/j.physletb.2009.11.040

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We describe hard exclusive processes beyond the leading twist approximation in a framework based on the Taylor expansion of the amplitude around the dominant light-cone directions. This naturally introduces an appropriate set of non-perturbative correlators whose number is minimalized after taking into account QCD equations of motion and the invariance under rotation on the light-cone. We exemplify this method at the twist 3 level and show that the coordinate and momentum space descriptions are fully equivalent. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：413 / 418

页数：6

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