Hadronic Physics in Geant4: improvements and status for LHC Start

Abstract

An overview of recent developments in Geant4 hadronic modelling is provided with a focus on the start of the LHC experiments. Improvements in low-energy and high energy models were introduced. Many of these developments were directed toward increasing the precision of simulated hadronic showers for LHC detectors. Theoretical arguments were used as well as tuning to thin target experiment data. The testing suite for the Geant4 hadronic models was extended. Selected validation results are presented. The variants of Geant4 physics model configurations (Physics Lists) for LHC experiments are discussed.