Fast hadron freeze-out generator, part II: noncentral collisions

TL;DR

This paper extends a Monte Carlo hadron generation model to simulate noncentral nuclear collisions, incorporating asymmetries in the freeze-out hyper-surface and flow profiles, and provides a publicly available C++ code.

Contribution

It introduces a method to model noncentral collisions with asymmetric freeze-out conditions within a Monte Carlo framework, enhancing previous symmetric models.

Findings

Demonstrates the model's ability to reproduce experimental data

Provides a flexible parametrization for asymmetries in freeze-out

Offers an open-source C++ generator for the community

Abstract

The fast Monte Carlo procedure of hadron generation developed in our previous work is extended to describe noncentral collisions of nuclei. We consider different possibilities to introduce appropriate asymmetry of the freeze-out hyper-surface and flow velocity profile. For comparison with other models and experimental data we demonstrate the results based on the standard parametrizations of the hadron freeze-out hyper-surface and flow velocity profile assuming either a common chemical and thermal freeze-out or the chemically frozen evolution from chemical to thermal freeze-out. The C++ generator code is written under the ROOT framework and is available for public use at http://uhkm.jinr.ru/