Multiparton interactions and multiparton distributions in QCD

Abstract

After a brief recapitulation of the general interest of parton densities, we discuss multiple hard interactions and multiparton distributions. We report on recent theoretical progress in their QCD description, on outstanding conceptual problems and on possibilities to use multiparton distributions as a laboratory to test and improve our understanding of hadron structure.

Comments: 10 pages, 6 figures. Talk presented at LIGHTCONE 2011, 23-27 May, 2011, Dallas