On the definition of the nucleon axial charge density
High Energy Physics - Phenomenology
2026-02-24 v2 Nuclear Theory
Abstract
We work out the spatial density distributions corresponding to the axial-vector charge density operator for spin-1/2 systems using states described by sharply localized wave packets in arbitrary Lorentz-frames. The static approximation, leading to the frequently assumed Breit-frame distributions, is also considered. We discuss the interpretation of the resulting spatial densities in terms of the axial charge density.
Cite
@article{arxiv.2412.05050,
title = {On the definition of the nucleon axial charge density},
author = {J. Yu. Panteleeva and E. Epelbaum and J. Gegelia and U. -G. Meißner},
journal= {arXiv preprint arXiv:2412.05050},
year = {2026}
}