A Low-Nussinov Model for gamma* p -> V p
Abstract
Description
We show that the lowest-order QCD calculation in a simple model of elastic vector-meson production does reproduce correctly the ratios of cross sections for rho, phi and J/psi (measured by H1 and ZEUS), both in photoproduction and in high-Q^2 quasi-elastic scattering. The mass and Q^2 dependence of the cross sections is reproduced as well. We also examine the lower-energy data, and see that the energy dependence of the cross section does not depend on Q^2, and that a comparison with rho and phi data from NMC suggests a soft pomeron intercept.
5 pages LaTeX, 6 Postscipt figures. Contribution to the XXXIInd Rencontre de Moriond on "QCD and High Energy Hadronic Interactions", Les Arcs 1800, France, March 22-29, 1997, to appear in the proceedings
5 pages LaTeX, 6 Postscipt figures. Contribution to the XXXIInd Rencontre de Moriond on "QCD and High Energy Hadronic Interactions", Les Arcs 1800, France, March 22-29, 1997, to appear in the proceedings