Simulation of low-energy antiproton annihilation in silicon

The simulation of the interaction of low-energy antiprotons in a silicon target is of primary importance to the AEGIS Collaboration at CERN. In Geant4 two different models, called CHIPS and FTFP, are implemented for the simulation of ¯p-nucleus annihilation at rest, but their validation is currently incomplete. The study presented in the following aims at describing their behavior while dealing with annihilation at rest in silicon, comparing their results on the one hand with data available in the literature and on the other hand with data collected by the AEGIS Collaboration using a silicon prototype.