%0 Journal Article
%T Fermi Motion and Quark Off-Shellness in Elastic Vector-Meson Production
%A I. Royen
%A J. R. Cudell
%J Physics
%D 1998
%I arXiv
%R 10.1016/S0550-3213(98)00858-X
%X We study ways of implementing Fermi momentum in elastic vector-meson production, and find that the usual on-shell assumption of quark models and quark wave functions cannot reproduce the ratio of the longitudinal cross section to the transverse one. We propose a new approach which allows the quarks to be off-shell, and which naturally reproduces the data. As a consequence, we prove that the asymptotic form of the transverse cross section is different from 1/Q^8. In this new model, we show that the mass, t and Q2 dependence of the cross sections are also reproduced. We also make predictions concerning the production of excited states such as the rho' and the psi'.
%U http://arxiv.org/abs/hep-ph/9807294v3