Comparison of Geant4 hadron generation with data from the interactions with beryllium nuclei of +8.9 GeV/c protons and pions, and of -8 GeV/c pions

TL;DR

This paper evaluates Geant4's hadron generation accuracy by comparing simulation results with experimental data from beryllium interactions at CERN, revealing notable discrepancies in particle spectra and angular distributions.

Contribution

It provides a detailed comparison of Geant4 simulations with experimental data for hadron production, highlighting areas where the simulation model diverges from observed results.

Findings

Significant disagreements in polar-angle distributions of secondary particles.

Discrepancies between simulated and experimental spectra of protons and pions.

Identification of specific kinematic regions with poor simulation accuracy.

Abstract

Hadron generation in the Geant4 simulation tool kit is compared with inclusive spectra of secondary protons and pions from the interactions with beryllium nuclei of +8.9 GeV/c protons and pions, and of -8.0 GeV/c pions. The data were taken in 2002 at the CERN Proton Synchrotron with the HARP spectrometer. We report on significant disagreements between data and simulated data especially in the polar-angle distributions of secondary protons and pions.