Novel features in exclusive vector--meson production

Details Novel features in exclusive vector--meson production Novel features in exclusive vector--meson production

2003-02-24

arxiv.org/abs/hep-ph/0302203v2

Phys.Rev. D68 (2003) 056008

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 4 figures, corrected discussion, results unchanged

Scientific paper

10.1103/PhysRevD.68.056008

It is shown that the universality of the initial and final state interactions responsible for the transition between the on-- and off--mass shell states leads to the energy independence of the ratio of exclusive $\rho$ electroproduction cross section to the total cross section. It is demonstrated that the above universality and explicit mass dependence of the exponent in the power--like energy behavior of the cross-section obtained in the approach based on unitarity is in a quantitative agreement with the high--energy HERA experimental data. We discuss also HERA results on angular distributions of vector--meson production.

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