Probing the post-collision state in quantum simulations of scattering

High-energy particle collisions can convert energy into matter through the inelastic production of new particles. Quantum simulations of these processes promise to shed light onto the nonequilibrium dynamics of collisions and the formation of subsequent many-particle states. Building on the recent first simulations of inelastic scattering on a quantum computer, this work develops methods to investigate the post-collision state. These techniques are used to identify newly produced particles and quantify their properties, providing quantitative evidence of inelastic effects. Developments necessary to simulate highly inelastic scattering in higher dimensional realistic systems are discussed.