Abstract
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.
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