Coupling dynamical and statistical mechanisms for baryonic cluster production in nucleus collisions of intermediate and high energies

Abstract

Central nucleus-nucleus collisions produce many new baryons and the nuclear clusters can be formed from these species. The phenomenological coalescence models were sufficiently good for description of light nuclei yields in a very broad range of collision energies. We demonstrate that in reality the coalescence process can be considered as 1) the formation of primary diluted excited baryon clusters and 2) their following statistical decay leading to the final cold fragment production. We argue that the formation of such excited systems from the interacting baryons is a natural consequence of the nuclear interaction at subnuclear densities resulting in the nuclear liquid-gas type phase transition in finite systems. In this way one can provide a consistent interpretation of the experimental fragment yields (FOPI data) including the important collision energy dependence in relativistic ion reactions. We investigate the regularities of this new kind of fragment production, for example, their yield, isospin, and kinetic energy characteristics. A generalization of such a clusterization mechanism for hypernuclear matter is suggested. The isotope yields and particle correlations should be adequate for studying these phenomena.

arXiv comment18 pages, 23 figures, to be submitted to Phys. Rev. C 2020

References in corpus (24)

• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• Coalescence and flow in ultra-relativistic heavy ion collisions
• Strangeness Production close to Threshold in Proton-Nucleus and Heavy-Ion Collisions
• Systematics of central heavy ion collisions in the 1A GeV regime
• Central Collisions of Au on Au at 150, 250 and 400 A MeV
• Dilepton production and off-shell transport dynamics at SIS energies
• Deuteron production from phase-space coalescence in the UrQMD approach
• Isospin dependent multifragmentation of relativistic projectiles
• Breakup Temperature of Target Spectators in Au + Au Collisions at E/A = 1000 MeV
• Production of hypernuclei in multifragmentation of nuclear spectator matter
• Formation of hypermatter and hypernuclei within transport models in relativistic ion collisions
• Dense baryonic matter: constraints from recent neutron star observations
• Nuclear coalescence from correlation functions
• The $O({\alpha }_s^2)$ Heavy Quark Corrections to Charged Current Deep-Inelastic Scattering at large Virtualities
• Formation of hypernuclei in high energy reactions within a covariant transport model
• Production of excited double hypernuclei via Fermi breakup of excited strange systems
• Production of spectator hypermatter in relativistic heavy-ion collisions
• Formation of hypernuclei in heavy-ion collisions around the threshold energies
• Production of hypernuclei in peripheral relativistic ion collisions
• What is the Physics behind the 3He-4He Anomaly ?
• Limits of complete equilibration of fragments produced in central Au on Au collisions at intermediate energies
• Formation of exotic baryon clusters in ultra-relativistic heavy-ion collisions
• Formation of hypernuclei in evaporation and fission processes

Cited by in corpus (7)

• Coalescence, the thermal model and multi-fragmentation: The energy and volume dependence of light nuclei production in heavy ion collisions
• 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
• Isospin compositions of correlated sources in the Fermi energy domain
• Production of nuclei and hypernuclei in pion-induced reactions near threshold energies
• Hypernuclei production with a modified coalescence model in BUU transport calculations
• Nucleation of baryons in relativistic hadron-nucleus collisions