An attempt to understand exclusive π + electroproduction

被引：164

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

页码：137 / 151

页数：15

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