On scaling solutions in the hydrodynamical theory of multiparticle production

The one-dimensional scale-invariant hydrodynamical model for hadron collisions is considered with particular attention being paid to the boundary conditions. It is shown that if scaling solutions are used inside the hadronic fluid, then there appear particle-like objects at the boundaries. These objects are identified with the leading particles. The boundary trajectories are found and analyzed. The effect of the increase of the hadronic fluid entropy is predicted.