4th Joint ECFA-NuPECC-APPEC Workshop “Synergies between the EIC and the LHC”

Session

TMDs II

9 Jun 2026, 14:20

Cagliari, Italy

58. Quarkonium shape functions

Raj Kishore (University of Basque Country)

09/06/2026, 14:20

A proper transverse momentum-dependent (TMD) factorization for quarkonium production at low transverse momentum necessitates the convolution of the TMD parton distribution function (TMDPDF) with an additional transverse momentum-dependent function, known as the TMD shape function (TMDShF). I will present the structure of the shape function and its phenomenological study in quarkonium...

48. Double $J/\psi$ production as a probe of gluon TMDs

Pieter Taels (University of Antwerp and IJCLab Orsay)

09/06/2026, 14:45

We present an extraction of the unpolarized gluon transverse-momentum dependent gluon PDF from LHCb data on inclusive double-$J/\psi$ production. We also discuss some novel theory developments regarding factorization and the role of the color-singlet shape function.

36. Gluon Sivers function in dijet production at the EIC

Patricia Andrea Gutierrez Garcia (Universidad Complutense de Madrid)

09/06/2026, 15:10

We explore the quark and the gluon Sivers function which appear in the factorization theorem of dijet production in semi-inclusive deep inelastic scattering. We revise the unpolarized TMD case and state the possibility of re-defining the resummation method, altering the treatment of the corresponding evolution kernels. Studying two resummation schemes we find strong dependence on gluon TMD...

45. Gluon saturation and the quantum evolution of the gluon diffractive TMD

Dionysios Triantafyllopoulos (ECT*, Trento)

09/06/2026, 15:30

We use the Color Glass Condensate description of electron-nucleus collisions at high energy to study the diffractive production of a pair of jets with transverse momenta much larger than the nuclear saturation momentum. At leading order in the QCD coupling, the cross-section exhibits transverse-momentum dependent factorisation. Gluon saturation determines the ``intrinsic scale'' of the gluon...