Geant4 and beyond: recent progress in precision physics modeling

TL;DR

This paper reviews recent advances in the validation and evaluation of physics models for photon and electron transport in Monte Carlo simulations, emphasizing statistical validation methods and cross-code comparisons.

Contribution

It provides a comprehensive overview of current physics models in Geant4 and other codes, highlighting validation techniques and recent progress in model accuracy.

Findings

Quantitative validation results for physics models

Use of rigorous statistical goodness-of-fit tests

Comparison of models across different Monte Carlo codes

Abstract

This extended abstract briefly summarizes ongoing research activity on the evaluation and experimental validation of physics methods for photon and electron transport. The analysis includes physics models currently implemented in Geant4 as well as modeling methods used in other Monte Carlo codes, or not yet considered in general purpose Monte Carlo simulation systems. The validation of simulation models is performed with the support of rigorous statistical methods, which involve goodness-of-fit tests followed by categorical analysis. All results are quantitative, and are fully documented.