Simplified approach to extracting nucleon transversity in collinear factorization using near-side energy-energy correlators
Abstract
We develop a novel strategy for accessing the transversity parton distribution function (PDF) of the nucleon within collinear factorization using near-side energy-energy correlators in the dihadron fragmentation framework. We show how this removes the complications of previous approaches that must model either intrinsic parton transverse momentum or resonances in the invariant mass distribution of a final-state dihadron. We present leading-order analytical results for transverse-spin observables in semi-inclusive deep-inelastic scattering and electron-positron annihilation, highlighting their close similarity to the expressions one uses in extracting (un)polarized PDFs and (single-hadron) fragmentation functions in collinear factorization. We make predictions for kinematics relevant for existing and future facilities that demonstrate the feasibility of an energy-energy correlator program in extracting the transversity PDF.
Keywords
Cite
@article{arxiv.2604.28131,
title = {Simplified approach to extracting nucleon transversity in collinear factorization using near-side energy-energy correlators},
author = {Zhong-Bo Kang and Andreas Metz and Daniel Pitonyak and Congyue Zhang},
journal= {arXiv preprint arXiv:2604.28131},
year = {2026}
}
Comments
5+3 pages, 3 figures; 3 pages, 2 figures of Supplemental Material; minor edits and typos corrected, remarks added about Jefferson Lab kinematics