Resummation, Evolution and Factorization REF 2026

Session

Talks II

19 Oct 2026, 17:10

Santiago de Compostela, Spain

12. Lattice QCD determination of the leading quark TMDPDFs

Qi-An Zhang

19/10/2026, 17:10

In this talk, I will give a brief overview of the Lattice Parton Collaboration’s recent lattice QCD studies of TMD observables within the Large Momentum Effective Theory (LaMET) framework. The presentation will cover first-principles determinations of the soft function, the Collins–Soper evolution kernel, as well as several key TMD parton distributions, including the unpolarized and helicity...

7. Phenomenological results on pion unpolarised TMDPDF

Valentin Moos (National Yang Ming Chiao Tung University)

19/10/2026, 17:40

I present an extraction for the unpolarised transverse momentum dependent (TMD) parton distribution functions (PDFs) for the quarks in the pion from measurements of the Drell-Yan process.
The results are obtained from a fit of the non-perturbative part of the TMDPDFs in the framework of TMD factorisation
and rely on the non-perturbative input for the collinear PDFs.

As the data is...

9. Probing the Collins effect in in $\gamma\gamma$ collisions

Carlo Flore (Università di Cagliari e INFN, Sezione di Cagliari)

19/10/2026, 18:00

Among the 8 leading-twist independent transverse momentum dependent fragmentation functions (TMD-FFs), the Collins function is the one describing the production of unpolarized hadrons from transversely polarized quarks. This FF is usually extracted, together with the TMD transversity distribution, from global fits to semi-inclusive DIS and $e^+e^-$ annihilation into hadron pairs data. Other...