Vector-Meson Electroproduction from Generalized Vector Dominance
High Energy Physics - Phenomenology
2009-10-31 v1 High Energy Physics - Experiment
Abstract
Including destructively interfering off-diagonal transitions of diffraction-dissociation type, we arrive at a formulation of GVD for exclusive vector-meson production in terms of a continuous spectral representation of dipole form. The transverse cross-section sigma_T for gamma* p -> V p behaves asymptotically as 1/Q^4, while R_V = sigma_L/sigma_T becomes asymptotically constant. Contributions violating s-channel helicity conservation stay at the 10-15% level established in low-energy photoproduction and diffractive hadron--hadron interactions. The data for phi- and rho-meson production for 0 \lsim Q^2 \lsim 20 GeV^2 from HERA are found to be in agreement with these predictions.
Cite
@article{arxiv.hep-ph/9810370,
title = {Vector-Meson Electroproduction from Generalized Vector Dominance},
author = {Dieter Schildknecht and Gerhard A. Schuler and Bernd Surrow},
journal= {arXiv preprint arXiv:hep-ph/9810370},
year = {2009}
}
Comments
16 pages, latex, 3 figures