Data of UrQMD Calculations of the Nucleonic Flow and Pion Production Observables

This dataset is based on simulations using the updated ultra-relativistic quantum molecular dynamics (UrQMD) model to analyze the impacts of isospin-independent momentum-dependent interactions (MDI) and near-threshold NN → NΔ cross-sections on nucleonic flow and pion production observables. By incorporating these updates, the dataset provides 17 key observables, including directed flow and elliptic flow for neutrons, protons, hydrogen, and charged particles, as well as pion multiplicity (M(π)) and its ratio (M(π−)/M(π+)). These observables are characterized as functions of transverse momentum or normalized rapidity.The datase is useful to understand the symmetry energy and its density-dependent behavior at the flow characteristic density of 1.2 ± 0.6ρ0 and the pion characteristic density of 1.5 ± 0.5ρ0. Through the analysis of the flow and pion observables, the corresponding symmetry energy constraints are obtained which are S(1.2ρ0) = 34 ± 4 MeV and S(1.5ρ0) = 36 ± 8 MeV.