Speaker
Description
Abstract:
We present recent work on the transverse momentum dependence of hadrons in semi-inclusive deep inelastic scattering, based on the two complementary factorization frameworks applicable at low and high transverse momentum. These approaches offer critical insight into the partonic structure of the nucleon. Focusing on observables such as the $\cos\phi$ azimuthal modulation, we explore the challenge of matching theoretical descriptions in the intermediate region, which motivates the study of transverse momentum dependent (TMD) factorization at next-to-leading power (NLP). While leading-power TMD factorization is well established, its NLP extension presents significant theoretical and technical challenges. Recent experimental results from COMPASS and Jefferson Lab have begun to shed light on sub-leading TMD effects. Advancing NLP factorization is essential for 3D hadron imaging in current and future DIS experiments, and
for global analyses in the EIC era. We also present preliminary studies of R-SIDIS at large transverse momentum for EIC kinematics. Such measurements can provide new constraints on the gluon parton distribution at large Bjorken-$x$.
