We investigate the twist-3 generalized parton distributions (GPDs) for the valence quarks of the proton within the basis light-front quantization (BLFQ) framework. We first solve for the mass spectra and light-front waved functions (LFWFs) in the leading Fock sector using an effective Hamiltonian. Using the LFWFs we then calculate the twist-3 GPDs via the overlap representation. By taking the forward limit, we also get the twist-3 parton distribution functions (PDFs), and discuss their properties. Our prediction for the twist-3 scalar PDF agrees well with the CLAS experimental extractions.
@article{arxiv.2312.00667,
title = {Twist-3 Generalized Parton Distribution for the Proton from Basis Light-Front Quantization},
author = {Ziqi Zhang and Zhi Hu and Siqi Xu and Chandan Mondal and Xingbo Zhao and James P. Vary},
journal= {arXiv preprint arXiv:2312.00667},
year = {2026}
}