Notes on the orbital angular momentum of quarks in the nucleon
High Energy Physics - Phenomenology
2015-06-03 v3
Abstract
We discuss the orbital angular momentum of partons inside a longitudinally polarized proton in the recently proposed framework of spin decomposition. The quark orbital angular momentum defined by Ji can be decomposed into the `canonical' and the `potential' angular momentum parts, both of which are represented as the matrix element of a manifestly gauge invariant operator.
Cite
@article{arxiv.1111.3547,
title = {Notes on the orbital angular momentum of quarks in the nucleon},
author = {Yoshitaka Hatta},
journal= {arXiv preprint arXiv:1111.3547},
year = {2015}
}
Comments
11 pages; v2. added comments and references on the Wigner distribution approach; v3. improved presentation, to appear in Phys.Lett.B