出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Transverse momentum dependent parton distribution functions (TMDPDFs) encode information
about the intrinsic motion of quarks inside the nucleon. They are important non-perturbative
ingredients in our understanding of, e.g., azimuthal asymmetries and other qualitative features in
semi-inclusive deep inelastic scattering experiments. We present first calculations on the lattice,
based on MILC gauge configurations and propagators from LHPC. They yield polarized and
unpolarized transverse momentum dependent quark densities and enable us to test the assumption
of factorization in x and k?. The operators we employ are non-local and contain a Wilson line,
whose renormalization requires the removal of a divergence linear in the cutoff a−1.
