Initial and final radii of the hadronic fluid produced in high energy p-p and p-bar-p collisions

Solving approximate hydrodynamical equations for hadronic fluid created in high energy p-p or p-bar-p collisions, we show that the initial radius of the fluid should be of the same order as that of proton, and that the energy dependence of the final radius is consistent with pion interferometric analysis. (author)