Double parton scattering in double logarithm approximation of   perturbative QCD
  Using the explicit form of the known single distribution functions (the Green's functions) in the double logarithm approximation of perturbative QCD, we analyze the structure of splitting diagrams as a source of double parton perturbative correlations in the proton. The related phenomenological effects are discussed for the conditions of the LHC experiments. 
M. G. Ryskin, A. M. Snigirev
hep-ph