Transverse momentum distributions of quarks in the nucleon from Lattice QCD

Understand

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 transverse momentum.