Single-spin asymmetry parameter from deeply virtual Compton scattering of hadrons up to twist-3 accuracy - I. Pion case

被引：18

作者：

Anikin, IV ^{[1
]}

Binosi, D

Medrano, R

Noguera, S

Vento, V

机构：

[1] Univ Valencia, Dept Fis Teor, E-46100 Burjassot, Spain

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

[3] CSIC, IFIC, E-46071 Valencia, Spain

[4] Korea Inst Adv Study, Sch Phys, Seoul 130012, South Korea

来源：

EUROPEAN PHYSICAL JOURNAL A | 2002年 / 14卷 / 01期

关键词：

D O I：

10.1140/epja/iepja1332

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The study of deeply virtual Compton scattering (DVCS) has shown that electromagnetic gauge invariance requires, to leading order. not only twist-two but additional twist-three contributions. We apply this analysis and. using the Ellis-Furmanski-Petronzio factorization scheme. compute the single- (electron) spin asymmetry arising in the collision of longitudinally polarized electrons with hadrons up to twist-3 accuracy. In order to simplify the kinematics we restrict the actual calculation to pions in the chiral limit. The process is described in terms of the generalized parton distribution functions which we obtain within a bag model framework.

引用

页码：95 / 103

页数：9

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