Workshop on Multi Parton Interaction

Multiple parton interactions are one of the most common, yet poorly understood, phenomena at the LHC. The results of the first LHC measurements differ substantially from predictions provided by Monte Carlo simulations. The modelling implemented in Monte Carlo generators aims to describe multiple scattering throughout the whole range of scales, from soft to hard. At the same time, much work is ongoing to improve theoretical understanding of multiple scatterings at both low and high pT, and study the related phenomenology at the LHC. Therefore it is extremely important to combine theoretical efforts in order to achieve a better description of multiple interactions, and, in general, the underlying event. Topics to be discussed will include: - Improving theoretical understanding of the multiple interaction (MPI) - Implementation in general purpose MC programs. - Current development on multi parton PDF and use of them in MC programs - Multi parton interaction contribution to signal and background processes - Recent experimental results for LHC (and Tevatron?) and plans for future measurements of MPI at the LHC - Continued development of better MC event generators UPLOADING slides: - Hit the 'Manage' button - the modification code is mpi10