Nucleation of baryons in relativistic hadron-nucleus collisions

TL;DR

This paper introduces a hybrid theoretical approach combining UrQMD and SMM models to describe baryon clusterization and nucleus formation in relativistic hadron-nucleus collisions, validated against experimental data.

Contribution

It presents a novel hybrid method integrating UrQMD and SMM models to simulate baryon clusterization and nucleus formation in hadron-nucleus reactions.

Findings

Model calculations agree with experimental data on baryon production.

The approach effectively describes transverse momenta, rapidity, and mass distributions.

Results suggest promising avenues for studying hypernuclei formation.

Abstract

We suggest a new theoretical method to describe the baryon clusterization of nuclei in hadron-nucleus reactions. As an example we have explored the nuclei production in $\pi^-+C$ and $\pi^-+W$ collisions at p$_{lab}$=1.7 GeV by using the hybrid approach consisting of the Ultra Relativistic Quantum Dynamics Model (UrQMD) and the Statistical Multifragmentation Model (SMM). The UrQMD describes the production of new baryons, and the propagation toward the subnuclear densities with the fluctuations leading to the formation of excited baryonic clusters. The SMM describes the production of final nuclei and hypernuclei after interaction of baryons inside these clusters. We demonstrate the transverse momenta, rapidity, mass distributions and excitation energies of both primary clusters and final nuclei (including hypernuclei). The results of the UrQMD and UrQMD+SMM model calculations for different clusterization parameters are compared with the available HADES experimental data on baryon production, providing a very promising window for future research on nuclei and hypernuclei formation in these reactions.