The leading Generalized Transverse Momentum Dependent parton distributions (GTMDs) are studied in the bag model. The model description is shown to be theoretically consistent. The orbital angular momentum is studied in terms of the GTMD F1,4q and Ji sum rule. Analytical proofs of the associated sum rules are given. A deeper relationship between orbital angular momentum and the pretzelosity TMD is established in this model.
Cite
@article{arxiv.2605.06412,
title = {GTMDs, orbital angular momentum, and pretzelosity},
author = {Brean Maynard and Peter Schweitzer},
journal= {arXiv preprint arXiv:2605.06412},
year = {2026}
}