Meson trajectories in the Markoffian approach in RFT

It is shown that the problem of absorption corrections to non-vacuum trajectories in reggeon field theory can be formulated as a non-linear death-and-birth process with diffusion. One has to consider two kinds of objects (wee sea and valence partons), the main difference between the two being that the first can reproduce itself autocatalytically during a boost, while the second can produce only the first one. (Auth.)