Transversity in exclusive vector-meson leptoproduction

被引：43

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 | 2014年 / 74卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

GENERALIZED PARTON DISTRIBUTIONS; DISTRIBUTION AMPLITUDES; FORM-FACTORS; ELECTROPRODUCTION; QUARK; RHO(0); GPDS;

D O I：

10.1140/epjc/s10052-014-2725-6

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：

The role of transversity or helicity-flip generalized parton distributions (GPDs) in leptoproduction of vector mesons is investigated within the framework of the handbag approach. The transversity GPDs in combination with twist-3 meson wave functions occur in the amplitudes for transitions from a transversely polarized virtual photon to a longitudinal polarized vector meson. The importance of the transversity GPDs can be examined in some of the spin density matrix elements and in transverse target spin asymmetries. Using suitable parametrizations of both helicity-flip and -non-flip GPDs, which are essentially taken from our previous papers, we estimate these observables and compare the results with available data.

引用

页码：1 / 13

页数：13

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