Integrating the Rivet analysis tool into EPOS 4

Abstract

EPOS 4 is the last version of the high-energy collision event generator EPOS, released publicly in 2022. It was delivered with improvements on several aspects, whether about the theoretical bases on which it relies, how they are handled technically, or regarding user’s interface and data compatibility. This last point is especially important, as part of a commitment to provide the widest possible use. In this regard, a new output data format have been implemented, based on the HepMC standard libraries. This feature enables in particular the analysis of EPOS simulations with Rivet , an analysis and validation toolkit for Monte Carlo event generators, with recent major upgrades on concerning heavy-ion analysis methods. In order to take advantage of this, the use of Rivet has been implemented directly in the EPOS analysis machinery, ensuring an easy and fast solution for comparison with experimental data, beneficial for both developers and users. We will hence present here the details of this implementation and the results obtained thanks to it.