Light nuclei production in Au + Au collisions at $\sqrt{s_{NN}}$ = 7.7-80 GeV from UrQMD model

Abstract

Light nuclei production in relativistic 197 Au + 197 Au collisions from 7.7 to 80 GeV is investigated within the Ultra-relativistic-Quantum-Molecular-Dynamics model (UrQMD) with a naive coalescence approach. The results display the production of light nuclei at mid-rapidity can essentially match up the experimental data and a slight enhancement of combined ratio of NpNt/N 2 d , which is sensitive to the neutron density fluctuations, occurs at around 20 GeV. However, considering the present UrQMD does not include the critical end point, this enhanced NpNt/N 2 d ratio should be understood with caution. Furthermore, within different rapidity regions, the kinetic temperatures of different light nuclei are extracted by the Blast-wave model analysis and ratios among different light nuclei are also discussed.