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. Here we present a first lattice approach
to polarized and unpolarized transverse momentum dependent quark densities, based on MILC
gauge configurations and propagators from LHPC. The operators we employ are non-local and
consist of spatially separated quark creation and annihilation operators connected by a straight
Wilson line. We briefly discuss their renormalization properties and our present strategies to
remove linear divergences in a−1.
