HIGHER-ORDER LONG-RANGE CORRELATIONS IN NUCLEAR-STRUCTURE AND DYNAMICS

An explicit correction term to the ensemble averaged trajectory for th e phase space single-particle distribution function due to the presenc e of the higher order long range correlations is considered. It is dem onstrated that this extension of the usually employed transport approa ches (BUU, BNV, LV, etc.) has a diffusion structure. The role of highe r order correlations in the cases of nuclear collective motion and the mean field decomposition effect in nuclear fragmentation at high temp eratures is analyzed. In particular we show the importance of higher o rder correlations for the transition from zero to first sound regime f or propagation of the collective excitation in hot nuclear matter.