Nucleation of baryons in relativistic hadron-nucleus collisions

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.

References in corpus (9)

• Isospin dependent multifragmentation of relativistic projectiles
• Production of hypernuclei in multifragmentation of nuclear spectator matter
• Formation of hypermatter and hypernuclei within transport models in relativistic ion collisions
• Measurements of ${}_{\Lambda }^3\mathrm{H}$ and ${}_{\Lambda }^4\mathrm{H}$ Lifetimes and Yields in Au+Au Collisions in the High Baryon Density Region
• Production of excited double hypernuclei via Fermi breakup of excited strange systems
• Coupling dynamical and statistical mechanisms for baryonic cluster production in nucleus collisions of intermediate and high energies
• Evolution of the statistical disintegration of finite nuclei toward high energy
• Nucleosynthesis of light nuclei and hypernuclei in central Au+Au collisions at $\sqrt{s_{NN}}$=3 GeV
• Production of nuclei and hypernuclei in pion-induced reactions near threshold energies