  We study the role of soft/nonperturbative correlations in the multi parton
interactions in the central kinematics relevant for double parton scattering
(DPS) and underlying event (UE) measurements at ATLAS and CMS. We show that the
effect of soft correlations is negligible for DPS regime (typical transverse
momenta larger than 10-20 GeV), but may be important for UE (several GeV
scale). The characteristic scale where soft correlations become important
increases with decrease of $x$ (energy increase) leading to approximately
constant \effs at small x.
