Constraining quark angular momentum through semi-inclusive measurements
Abstract
The determination of quark angular momentum requires the knowledge of the generalized parton distribution E in the forward limit. We assume a connection between this function and the Sivers transverse-momentum distribution, based on model calculations and theoretical considerations. Using this assumption, we show that it is possible to fit at the same time nucleon magnetic moments and semi-inclusive single-spin asymmetries. This imposes additional constraints on the Sivers function and opens a plausible way to quantifying quark angular momentum.
Keywords
Cite
@article{arxiv.1107.5755,
title = {Constraining quark angular momentum through semi-inclusive measurements},
author = {Alessandro Bacchetta and Marco Radici},
journal= {arXiv preprint arXiv:1107.5755},
year = {2013}
}
Comments
4 pages, 1 figure. Version 2 is similar to publised version, has minor changes in text and bibliography, and the final values of angular momentum are quoted at a different scale compared to Version 1