Studying the gluon TMDs with $J/\psi$- and $\Upsilon$-pair production at the LHC

Understand

We report on how $J/\psi$- and $\Upsilon$-pair production are promising processes to access the polarised and unpolarised gluon TMDs at the LHC.

• We present the formalism used, as well as resulting observables that could be extracted from data.