A description of the target wave-function encoded in the source terms
  We argue that the gauge invariant source terms in the formalism of the Color Glass Condensate (CGC) should properly describe the target wave-function if the microscopic structure is concerned in the regime where the parton distribution is not quite dense. The quantum property of color charge density is incorporated in the quantum weight function defined with the source terms. We sketch that the logarithmic source terms encompass a meaningful picture of the microscopic structure of the target wave-function. 
Kenji Fukushima