Are there approximate relations among transverse momentum dependent distribution functions?

被引：54

作者：

Avakian, H. ^{[1
]}

Efremov, A. V. ^{[2
]}

Goeke, K. ^{[3
]}

Metz, A. ^{[3
,4
]}

Schweitzer, P. ^{[3
]}

Teckentrup, T. ^{[3
]}

机构：

[1] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[2] Joint Inst Nucl Res, Dubna 141980, Russia

[3] Ruhr Univ Bochum, Inst Theoret Phys 2, D-44780 Bochum, Germany

[4] Temple Univ, Dept Phys, Philadelphia, PA 19122 USA

来源：

PHYSICAL REVIEW D | 2008年 / 77卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.77.014023

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Certain exact relations among transverse momentum dependent parton distribution functions due to QCD equations of motion turn into approximate ones upon the neglect of pure twist-3 terms. On the basis of available data from HERMES, we test the practical usefulness of one such "Wandzura-Wilczek-type approximation," namely, of that connecting h(1L)(perpendicular to(1)a)(x) to h(L)(a)(x), and discuss how it can be further tested by future CLAS and COMPASS data.

引用

页数：9

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