Presented by Marc Schlegel, University of Tuebingen

Friday, February 19, 2016, 11:00 am — Small Seminar Room, Bldg. 510

Perturbative QCD based on the Parton Model of the nucleon is a very
successful theoretical approach to describe high-energy processes at
particle accelerators and colliders. In particular, parton distribution
functions are key ingredients of this approach and give information on
the partonic substructure of the nucleon. As such they deliver a
one-dimensional picture of how the parton momenta are distributed in the
nucleon.
In this talk extensions of the parton model are presented which provide
access to more detailed information on the dynamics of partons in the
nucleon. In particular observables involving transversely polarized
nucleons are discussed. They can be described in terms of dynamical
quark-gluon correlations which in turn can be studied at an Electron-Ion
Collider.
Another extension of the parton model takes into account the intrinsic
transverse motion of the partons. In this approach - called Transverse
Momentum Dependent (TMD) factorization - one can study three-dimensional
distributions of the parton momenta. In addition, implications of the
transverse motion of gluons in the nucleon will be discussed for LHC
physics.