Lorentz invariance relations for twist-3 quark distributions
High Energy Physics - Phenomenology
2020-01-14 v1 High Energy Physics - Theory
Abstract
We calculate twist-3 parton ditribution functions (PDFs) using cut and uncut diagrams. Uncut diagrams lead to a Dirac delta function term. No such term appears when cut diagrams are used. We show that a is necessary to satisfy the Lorentz invariance relations of twist-3 PDFs, except for the Burkhardt-Cottingham sum rule in QCD.
Keywords
Cite
@article{arxiv.2001.03655,
title = {Lorentz invariance relations for twist-3 quark distributions},
author = {Fatma P. Aslan and Matthias Burkardt},
journal= {arXiv preprint arXiv:2001.03655},
year = {2020}
}