# AAfrag: Interpolation routines for Monte Carlo results on secondary production in proton-proton, proton-nucleus and nucleus-nucleus interactions

## TL;DR

This paper presents AAfrag, a set of interpolation routines for Monte Carlo predictions of secondary particle production in various high-energy nuclear interactions, based on the improved QGSJET-II-04m model calibrated with recent experimental data.

## Contribution

It introduces AAfrag routines for interpolating QGSJET-II-04m predictions, incorporating recent experimental data and improved low-energy secondary particle production modeling.

## Key findings

- Enhanced accuracy of secondary particle spectra predictions.
- Inclusion of recent LHC and NA61 experimental data.
- Analysis of Feynman scaling violation and isospin effects.

## Abstract

We provide a compilation of predictions of the QGSJET-II-04m model for the production of secondary species (photons, neutrinos, electrons, positrons, and antinucleons) that are covering a wide range of energies of the beam particles in proton-proton, proton-nucleus, nucleus-proton, and nucleus-nucleus reactions. The current version of QGSJET-II-04m has an improved treatment of the production of secondary particles at low energies: the parameters of the hadronization procedure have been fine-tuned, based on a number of recent benchmark experimental data, notably, from the LHCf, LHCb, and NA61 experiments. Our results for the production spectra are made publicly accessible through the interpolation routines AAfrag which are described below. Besides, we comment on the impact of Feynman scaling violation and isospin symmetry effects on antinucleon production.