Checking the Burkardt sum rule for the Sivers function by model calculations
High Energy Physics - Phenomenology
2008-11-26 v2
Abstract
The Sivers mechanism gives rise to a non-zero average transverse momentum of partons inside a transversely polarized target. According to a sum rule of Burkardt this transverse momentum vanishes when summing over all partons. We explicitly check the Burkardt sum rule by means of one-loop calculations for a quark target in perturbative QCD and for a diquark spectator model of the nucleon. In both cases the sum rule is fulfilled.
Keywords
Cite
@article{arxiv.hep-ph/0601133,
title = {Checking the Burkardt sum rule for the Sivers function by model calculations},
author = {K. Goeke and S. Meissner and A. Metz and M. Schlegel},
journal= {arXiv preprint arXiv:hep-ph/0601133},
year = {2008}
}
Comments
final version, to appear in Phys. Lett. B