2009/05/25 by Matthias Burkardt, Burkardt, Matthias
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.0905.4079
9 pages, invited talk at `Spin Structure at Low $Q^2$', Jefferson Lab, March 2009
arxiv created 2009/05/25 · arxiv updated 2009/12/01
Polarized structure functions at low Q2 have the physical interpretation of (generalized) spin polarizabilities. At high Q2, the polarized parton distribution g2(x) provides access to quark-gluon correlations in the nucleon. We discuss the interpretation of the x2 moment of g2(x) as an average transverse force on quarks in deep-inelastic scattering from a transversely polarized target. Qualitative connections with generalized parton distributions are emphasized. The x2 moment of the chirally-odd twist-3 parton distribution e(x) provides information on the dependence of the average transverse force on the transversity of the quark.