Multiple interactions and generalized parton distributions

Understand

Multiple parton interactions in a single proton-proton collision are expected to play an important role for many observables at LHC.

• To a large part their phenomenological description relies on rather simple and physically intuitive assumptions.
• We report on an investigation of multiple hard interactions in QCD, which aims at identifying to which extent this simple description arises from theory and where it needs to be extended.
• An approximate connection with generalized parton distributions may help elucidate some aspects of multiple-interaction dynamics.