Sivers function in constituent quark models
High Energy Physics - Phenomenology
2017-08-23 v1
Abstract
A formalism to evaluate the Sivers function, developed for calculations in constituent quark models, is applied to the Isgur-Karl model. A non-vanishing Sivers asymmetry, with opposite signs for the u and d flavor, is found; the Burkardt sum rule is fulfilled up to 2 %. Nuclear effects in the extraction of neutron single spin asymmetries in semi-inclusive deep inelastic scattering off 3He are also evaluated. In the kinematics of JLab, it is found that the nuclear effects described by an Impulse Approximation approach are under control.
Cite
@article{arxiv.0807.4821,
title = {Sivers function in constituent quark models},
author = {S. Scopetta and A. Courtoy and F. Fratini and V. Vento},
journal= {arXiv preprint arXiv:0807.4821},
year = {2017}
}
Comments
8 pages, 3 figures, invited talk at the "2nd International Workshop on Transverse Polarization Phenomena in Hard Processes" (Transversity 2008), Ferrara, Italy, May 28-31, 2008