An attempt to understand exclusive π + electroproduction

被引：153
|
作者：
Goloskokov, S. V. [1 ]
Kroll, P. [2 ,3 ]
机构：
[1] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Moscow Region, Russia
[2] Univ Wuppertal, Fachbereich Phys, D-42097 Wuppertal, Germany
[3] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany
来源：
EUROPEAN PHYSICAL JOURNAL C | 2010年 / 65卷 / 1-2期
关键词：
GENERALIZED PARTON DISTRIBUTIONS; VECTOR-MESON ELECTROPRODUCTION; PSEUDOSCALAR MESONS; LEPTON SCATTERING; NONLEADING TWIST; WAVE-FUNCTIONS; CROSS-SECTION; PI(+) MESONS; FORM-FACTOR; PHOTOPRODUCTION;
D O I：
10.1140/epjc/s10052-009-1178-9
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：
Hard exclusive pi (+) electroproduction is investigated within the handbag approach. The prominent role of the pion-pole contribution is demonstrated. It is also shown that the experimental data require a twist-3 effect which ensues from the helicity-flip generalized parton distribution H (T) and the twist-3 pion wave function. The results calculated from this handbag approach are compared in detail with the experimental data on cross sections and spin asymmetries measured with a polarized target. It is also commented on consequences of this approach for exclusive pi (0) and vector-meson electroproduction.
引用
收藏
页码：137 / 151
页数：15
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