Gluon Contributions to Parity-Violating Asymmetries in Polarized Proton-Proton Scattering
High Energy Physics - Phenomenology
2009-11-07 v1
Abstract
We report on a calculation of one-loop weak corrections to polarized quark-gluon scattering and the corresponding crossed channels. Such contributions are suppressed formally by one power of alpha_s relative to W- or Z-mediated quark-quark scattering, but would enable the spin asymmetry of the gluon distribution to contribute to parity-violating asymmetries that will soon be investigated in polarized proton-proton scattering experiments at RHIC. In certain kinematic regions, gluon contributions to parity-violating asymmetries can be as large as 10% of the tree-level W- and Z-exchanges in quark-quark scattering, but usually only where the parity-violating asymmetries are already small.
Keywords
Cite
@article{arxiv.hep-ph/0102340,
title = {Gluon Contributions to Parity-Violating Asymmetries in Polarized Proton-Proton Scattering},
author = {John Ellis and Stefano Moretti and Douglas Ross},
journal= {arXiv preprint arXiv:hep-ph/0102340},
year = {2009}
}
Comments
LATEX 12 pages, 6 figures