Abstract
We study the semiclassical interpretation of the and moments of twist-3 parton distribution functions (PDFs). While no semiclassical interpretation for the higher moments of and was found, the moment of the chirally odd spin-dependent twist-3 PDF can be related to the longitudinal gradient of the transverse force on transversely polarized quarks in longitudinally polarized nucleons in a deep-inelastic scattering experiment. We discuss how this result relates to the torque acting on a quark in the same experiment. This has further implications for comparisons between the Jaffe-Manohar and the Ji decompositions of the nucleon spin.
- Received 30 September 2016
DOI:https://doi.org/10.1103/PhysRevD.94.094040
© 2016 American Physical Society