Gluon TMDs and Opportunities at an EIC

Abstract

We show how transverse momentum dependent gluon distributions could be probed at a future Electron-Ion Collider through the analysis of transverse momentum spectra and azimuthal asymmetries in the inclusive electroproduction of $J/\psi$ and ${\rm Y}$ mesons. The maximum values of these asymmetries, obtained in a model-independent way by imposing the positivity bounds of the polarized gluon distributions, suggest the feasibility of the proposed measurements.

Comments: 4 pages, 2 figures; to appear in the proceedings of the INT program "Probing Nucleons and Nuclei in High Energy Collisions", Seattle (USA), 1 October - 16 November (2018)