### Gluon Sivers and experimental considerations for TMDs.

Thomas Burton
The study and characterisation of transverse-momentum-dependent distribution functions (TMDs) is a major goal of the Electron-Ion Collider (EIC) physics programme. The study of gluon TMDs poses a greater challenge than for quark TMDs in DIS measurements, as gluons do not directly couple to photons. The study of $D$ meson pairs has been proposed to provide access to gluon TMDs, but is demanding due to the rarity of $D$ production. Here, we discuss the feasibility of...