2008/10/20 by Matthias Burkardt, Burkardt, Matthias
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.0810.3589
6 pages, version to appear in PRD
arxiv created 2013/11/16 · arxiv updated 2013/11/19
The interaction dependent part of the x2-moment of the twist-3 polarized parton distribution g2(x) is related to the transverse force acting on the active quark in deep-inelastic scattering off a transversely polarized nucleon immediately after it has absorbed the virtual photon. Similarly, the x2-moment of the chirally odd twist-3 unpolarized parton distribution e(x) can be related to the transverse force experienced by a transversely polarized quark ejected from a transversely polarized nucleon.