The impact factor for the virtual photon to light vector meson transition
High Energy Physics - Phenomenology
2009-11-10 v2
Abstract
We evaluate in the next-to-leading approximation the forward impact factor for the virtual photon to light vector meson transition in the case of longitudinal polarization. We find that in the hard kinematic domain, both in the leading and in the next-to-leading approximation, the expression for the impact factor factorizes, up to power suppressed corrections, into the convolution of a perturbatively calculable hard-scattering amplitude and a meson twist-2 distribution amplitude.
Cite
@article{arxiv.hep-ph/0405297,
title = {The impact factor for the virtual photon to light vector meson transition},
author = {D. Yu. Ivanov and M. I. Kotsky and A. Papa},
journal= {arXiv preprint arXiv:hep-ph/0405297},
year = {2009}
}
Comments
31 pages latex; few comments and one reference added; version to appear in Eur. Phys. Journal C