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Gluon Contributions to Parity-Violating Asymmetries in Polarized Proton-Proton Scattering

John Ellis·Stefano Moretti·Douglas Ross
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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.

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John Ellis, Stefano Moretti, Douglas Ross. 2001-02-28. Gluon Contributions to Parity-Violating Asymmetries in Polarized Proton-Proton Scattering. https://doi.org/10.1088/1126-6708%2F2001%2F06%2F043

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