Strangeness Production in low energy Heavy Ion Collisions via Hagedorn Resonances

TL;DR

This paper introduces a new dynamical model using Hagedorn resonances to explain strangeness production in low-energy heavy ion collisions, successfully matching experimental data on multiplicities and energy distributions.

Contribution

It develops a novel approach incorporating Hagedorn states into the GiBUU model, respecting quantum numbers, to better understand strangeness production near threshold energies.

Findings

Successfully reproduces experimental strangeness multiplicities

Matches exponential energy distribution slopes

Provides a dynamical explanation for near-threshold strangeness production

Abstract

A novel, unorthodox picture of the dynamics of heavy ion collisions is developed using the concept of Hagedorn states. A prescription of the bootstrap of Hagedorn states respecting the conserved quantum numbers baryon number B, strangeness S, isospin I is implememted into the GiBUU transport model. Using a strangeness saturation suppression factor suitable for nucleon-nucleon-collisions, recent experimental data for the strangeness production by the HADES collaboration in Au+Au and Ar+KCl is reasonable well described. The experimental observed exponential slopes of the energy distributions are nicely reproduced. Thus, a dynamical model using Hagedorn resonance states, supplemented by a strangeness saturation suppression factor, is able to explain essential features (multiplicities, exponential slope) of experimental data for strangeness production in nucleus-nucleus collisions close to threshold.