"Nucleon tomography through exclusive and semi-inclusive processes"

Exclusive and semi-inclusive processes are formidable means for accessing
to parts of the parton phase-space distribution. From exclusive processes
one can extract generalized parton distributions which encode information
on parton collinear momentum and transverse position. From semi-inclusive
processes one can extract transverse-momentum dependent parton
distributions which encode information on parton three-momentum. These two
complementary three-dimensional pictures of the nucleon are particularly
important as they shed light on parton orbital angular momentum, initial-
and final-state interactions, and more generally on the non-perturbative
regime of QCD. We propose a short introduction to the theoretical
framework for interpreting these processes and discuss the kind of
information one can extract from them.