Exclusive $J/\psi$ photoproduction and gluon polarization
High Energy Physics - Phenomenology
2009-10-31 v3
Abstract
In exclusive production by polarized photons incident on polarized protons, a finite polarization asymmetry arises because of Fermi-motion and binding-energy effects. The asymmetry depends on the polarized nonforward gluon distribution of the proton and thus gives information on gluon polarization in the proton. The analyzing power, however, is rather small.
Cite
@article{arxiv.hep-ph/9807287,
title = {Exclusive $J/\psi$ photoproduction and gluon polarization},
author = {M. Vänttinen and L. Mankiewicz},
journal= {arXiv preprint arXiv:hep-ph/9807287},
year = {2009}
}
Comments
11 pages, Latex, psfig, 2 figures; v2: references and acknowledgement updated; v3: sign of asymmetry reversed, conclusions unchanged, to appear in Phys. Lett. B