Speaker
Artur Avkhadiev
Description
This talk will present the first nonperturbative constraints on the gluon (CS) Collins-Soper kernel — a universal anomalous dimension of transverse-momentum-dependent gluon distributions — in the range of transverse momentum scales $q_{T} \in [300\text{ MeV}, 1.3\text{ GeV}]$. The constraints are obtained with lattice QCD at a close-to-physical pion mass $M_\pi = {172(3)}\text{ MeV}$, a single lattice spacing $a=0.15\text{ fm}$, and next-to-next-to-leading logarithmic matching in Large-Momentum Effective Theory. These results represent the first step toward a controlled determination of the kernel, with eventual impact on phenomenological analyses sensitive to the gluon structure of hadronic matter.