Diffractive rho^0 photo- and leptoproduction at high energies
High Energy Physics - Phenomenology
2009-10-28 v1
Abstract
We discuss the elastic photo- and leptoproduction of rho^0-mesons from nucleons at Q^2 < 1 GeV^2 as studied in recent experiments at HERA and FNAL. We find that the mass distribution of the measured \pi^+\pi^- pairs is determined to a large extent by the two-pion contribution to the photon spectral function as given by the pion form factor. With rising Q^2 the rate of diffractive events decreases and the \pi^+\pi^- mass distribution approaches a symmetric shape.
Cite
@article{arxiv.hep-ph/9610302,
title = {Diffractive rho^0 photo- and leptoproduction at high energies},
author = {G. Niesler and G. Piller and W. Weise},
journal= {arXiv preprint arXiv:hep-ph/9610302},
year = {2009}
}
Comments
7 pages LaTeX, 3 figures, to appear in Phys.Lett.B