Deuteron production from phase-space coalescence in the UrQMD approach

TL;DR

This paper demonstrates that the UrQMD phase-space coalescence model accurately reproduces deuteron and anti-deuteron production across a wide energy range, aligning well with experimental data and thermal model estimates.

Contribution

It introduces a universal set of coalescence parameters that effectively describe deuteron production from GSI energies to LHC, independent of system size and energy.

Findings

Good agreement with experimental deuteron data across energies

Consistent d/p ratios with energy and centrality dependence

Effective description of anti-deuteron production

Abstract

UrQMD phase-space coalescence calculations for the production of deuterons are compared with available data for various reactions from the GSI/FAIR energy regime up to LHC. It is found that the production process of deuterons, as reflected in their rapidity and transverse momentum distributions in p+p, p+A and A+A collisions at a beam energies starting from the GSI energy regime around 1 AGeV and up to the LHC, are in good agreement with experimental data. We further explore the energy and centrality dependence of the d/p ratios. Finally, we discuss anti-deuteron production for selected systems. Overall, a good description of the experimental data is observed. The results are also compatible with thermal model estimates. Most importantly this good description is based only on a single set of coalescence parameters that is independent of energy system size and can also be applied for anti-deuterons.