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 of the production of light nuclei at midrapidity can essentially match up the experimental data and a slight enhancement of combined ratio of $N_p{N}_t/N_d^2$ where $N_p,N_d$ and $N_t$ represent respectively the yields of proton, deuteron and triton, which is sensitive to the neutron density fluctuations, occurs around 20 GeV. However, this enhanced $N_p{N}_t/N_d^2$ ratio should not be over-understood considering that the present UrQMD model is a cascade version without equation of state (EoS), i.e. there is an absence of critical end point mechanism. 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.

8 pages, 8 figures

References in corpus (8)

• Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
• Fully integrated transport approach to heavy ion reactions with an intermediate hydrodynamic stage
• Has the QCD Critical Point been Signaled by Observations at RHIC ?
• Measuring Shear Viscosity Using Transverse Momentum Correlations in Relativistic Nuclear Collisions
• Beam energy dependence of (anti-)deuteron production in Au+Au collisions at RHIC
• Density fluctuations in the presence of spinodal instabilities
• Chiral Symmetry and Heavy-Ion Collisions
• Nuclear modification factor in intermediate-energy heavy-ion collisions