Quark angular momentum and the Sivers asymmetry
Abstract
The determination of quark angular momentum requires the knowledge of the generalized parton distribution 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 anomalous magnetic moments and semi-inclusive single-spin asymmetries. This imposes additional constraints on the Sivers function and opens a plausible way to quantifying the quark angular momentum.
Keywords
Cite
@article{arxiv.1206.2565,
title = {Quark angular momentum and the Sivers asymmetry},
author = {Alessandro Bacchetta and Marco Radici},
journal= {arXiv preprint arXiv:1206.2565},
year = {2012}
}
Comments
4 pages, RevTeX style, 2 figures: updated version of fig.2, extended references accordingly; based on the proceedings of "XX International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2012)", March 26-30 2012, Bonn (Germany), and of "Sixth International Conference on Quarks and Nuclear Physics (QNP2012)", April 16-20 2012, Palaiseau (France)