EPOS LHC : test of collective hadronization with LHC data

TL;DR

This paper updates the EPOS Monte Carlo model to accurately simulate LHC data, focusing on collective hadronization effects in various collision systems, enhancing understanding of particle production mechanisms.

Contribution

The paper introduces new parametrizations of flow in EPOS LHC, tailored for small and large collision volumes, improving data reproduction across different collision types.

Findings

EPOS LHC accurately reproduces LHC minimum bias data.

Different flow parametrizations are effective for p-p and heavy ion collisions.

Transition between flow regimes can be tested with p-Pb data.

Abstract

EPOS is a Monte-Carlo event generator for minimum bias hadronic interactions, used for both heavy ion interactions and cosmic ray air shower simulations. Since the last public release in 2009, the LHC experiments have provided a number of very interesting data sets comprising minimum bias p-p, p-Pb and Pb-Pb interactions. We describe the changes required to the model to reproduce in detail the new data available from LHC and the consequences in the interpretation of these data. In particular we discuss the effect of the collective hadronization in p-p scattering. A different parametrization of flow has been introduced in the case of a small volume with high density of thermalized matter (core) reached in p-p compared to large volume produced in heavy ion collisions. Both parametrizations depend only on the geometry and the amount of secondary particles entering in the core and not on the beam mass or energy. The transition between the two flow regimes can be tested with p-Pb data. EPOS LHC is able to reproduce all minimum bias