We propose a novel strategy to systematically isolate the nucleon's intrinsic non-perturbative three-dimensional structure by employing 0-jettiness to suppress initial-state radiation in transverse momentum-dependent (TMD) observables. Applying this method to transverse single spin asymmetries (SSAs) in W+/- and Z0 boson production at RHIC, we demonstrate a substantial enhancement of the asymmetry signal (e.g., by 83% for Z0 SSA at q⊥=5 GeV), enabling a more definitive test of the predicted sign change of the Sivers function -- a key prediction of TMD factorization. We further explore its applicability to spin-dependent measurements at the Electron-Ion Collider. Our analysis is formulated within a joint resummation framework that systematically resums large logarithms associated with both the veto scale and the gauge boson's transverse momentum.
@article{arxiv.2506.15962,
title = {Nucleon Tomography with 0-jettiness},
author = {Shen Fang and Shuo Lin and Ding Yu Shao and Jian Zhou},
journal= {arXiv preprint arXiv:2506.15962},
year = {2025}
}