New Developments of EPOS 2

TL;DR

EPOS 2 enhances the hadronic interaction model used in cosmic ray and particle physics to better simulate high-energy collisions, addressing previous limitations and incorporating new physics constraints.

Contribution

This paper introduces EPOS 2, a significantly improved version of the EPOS model, with updated physics and constraints for more accurate high-energy collision simulations.

Findings

Improved description of hadronic interactions in air showers.

Better modeling of hard processes and collective effects at LHC energies.

Enhanced agreement with experimental data.

Abstract

Since 2006, EPOS hadronic interaction model is being used for very high energy cosmic ray analysis. Designed for minimum bias particle physics and used for having a precise description of SPS and RHIC heavy ion collisions, EPOS brought more detailed description of hadronic interactions in air shower development. Thanks to this model it was possible to understand why there were less muons in air shower simulations than observed in real data. With the start of the LHC era, a better description of hard processes and collective effects is needed to deeply understand the incoming data. We will describe the basic physics in EPOS and the new developments and constraints which are taken into account in EPOS 2.