Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-01-21
Eur.Phys.J. C29 (2003) 353-364
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages LaTex, 4 eps-figures
Scientific paper
10.1140/epjc/s2003-01238-9
The end-point contributions in the quark longitudinal momentum fraction of the virtual photon ($\gamma^*$) to vector meson ($V$) impact factor to the diffractive electroproduction amplitude can be factorized in terms of a generalized parton evolution of the target parton distribution. The result is used to model the helicity amplitudes $\gamma^* p \to V p$ in terms of small $x$ generalized parton distributions.
Ivanov Anatoly A.
Kirschner Roland
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