Double Parton Interactions in p -A collisions and Partonic Correlations

The Double Parton Scattering dynamics is different in p-p and in p-A collisions. Their joint study of DPS in p-p and in p-A collisions can therefore provide valuable information on the non-perturbative input to the process, namely multi-parton correlations, which cannot be obtained by studying DPS in p-p only. By studying WJJ production in p-Pb collisions, we estimate that the fraction of events due to DPS may be larger by a factor 3 or 4, as compared to p-p collisions, while the amount of the increased fraction can give information on the importance of different correlation terms.