Contribution invited talk
Gluon TMDs from Quarkonium production in proton collisions
In this talk it is discussed how gluon TMDs - in particular the distribution of linearly polarized gluons - can be accessed in proton collisions at the LHC. A particularly promising reaction is the production of quarkonium pairs. Using existing LHCb data for this final state allows to obtain a first idea of how the TMD distribution of unpolarized gluons in the nucleon might look like. In addition, estimates of azimuthal modulations that are sensitive to a possible linear polarization of gluons in the nucleon are presented.