J.P. Wellisch

TL;DR: The Gelfant 4 toolkit as discussed by the authors is a toolkit for simulating the passage of particles through matter, including a complete range of functionality including tracking, geometry, physics models and hits.

TL;DR: GeGeant4 as mentioned in this paper is a software toolkit for the simulation of the passage of particles through matter, it is used by a large number of experiments and projects in a variety of application domains, including high energy physics, astrophysics and space science, medical physics and radiation protection.

TL;DR: The Binary Cascade is introduced, and its predictive power for hadron spectra in nucleon nuclear reactions final states is investigated, to describe the time evolution of particles passing through the nuclear medium.

TL;DR: In this article, the authors give a brief overview of the physics underlying hadronic shower simulation, discussing the three basic types of modeling; data-driven, parametrization-driven and theory-driven modeling at the example of geant4.

TL;DR: The CMS approach to software process improvement in this process R&D is presented, lessons learned, and mistakes made are described, and it is demonstrated the benefits gained, and the current status of the software processes established in CMS off-line software.