Target fragmentation in hadron-nucleus collisions at high energy

We discuss target fragmentations in hadron-nucleus collisions at high energy (5–400 GeV). A model is developed which is based on the two-step (fast and slow) processes. A high-energy hadron drills a linear hole inside the nucleus, kicking out several nucleons (fast process). Along the linear hole, the target breaks up into a few pieces. One of the fragments forms an observed nucleus, absorbing some of the recoil nucleons (slow process). During the breakup, the Coulomb interaction between the fragment and the rest is taken into account. This leads to the consideration of a three-body breakup process which influences significantly the low-energy part of the energy distribution in the h+A → B+X reaction. The model is applied to the angular and the energy distributions in this collision. It achieves a nice agreement with experiment.