Diffraction production of a q(q)over-bar pair and a ρ meson on a polarized nucleon in deep-inelastic scattering

被引：0
|
作者：
Ryskin, MG [1 ]
机构：
[1] Petersburg Nucl Phys Inst, Gatchina 188350, Russia
来源：
PHYSICS OF ATOMIC NUCLEI | 1999年 / 62卷 / 02期
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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 amplitude for the diffraction dissociation of a heavy photon into a quark-antiquark pair on a polarized nucleon is calculated in the leading-logarithmic approximation of QCD. The amplitude of dissociation into a rho meson is evaluated within the hypothesis of parton-hadron duality. Spin-spin asymmetry is expressed in terms of the nucleon-spin-dependent gluon and quark structure functions (Delta G and Delta q, respectively). In view of this, the dissociation processes gamma* + p --> (<q(q)over bar>) + p and gamma* + p --> rho + p can be used to measure the spin-dependent gluon structure function Delta G(x, q(2)) in the region of small x.
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页码：315 / 322
页数：8
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