Relativistic hadron-hadron collisions in the ultra-relativistic quantum molecular dynamics model

TLDR

The ultra‑relativistic quantum molecular dynamics (UrQMD) model simulates hadron‑hadron collisions across a wide energy range, describing low‑energy interactions via hadron and resonance exchanges and high‑energy processes through colour‑string excitation and fragmentation. The study aims to obtain higher‑precision hadronic reaction data to validate and improve the UrQMD model for relativistic heavy‑ion collisions. UrQMD reproduces experimental hadron‑hadron data reasonably well across a broad range of centre‑of‑mass energies.

Abstract

Hadron-hadron (h-h) collisions at high energies are investigated in the ultra-relativistic quantum molecular dynamics (UrQMD) approach. This microscopic transport model describes the phenomenology of hadronic interactions at low and intermediate energies (<5 GeV) in terms of interactions between known hadrons and their resonances. At higher energies, >5 GeV, the excitation of colour strings and their subsequent fragmentation into hadrons dominates the multiple production of particles in the UrQMD model. The model shows a fair overall agreement with a large body of experimental h-h data over a wide range of h-h centre-of-mass energies. Hadronic reaction data with higher precision would be useful to support the use of the UrQMD model for relativistic heavy-ion collisions.