9 De Filippo, Enrico Alvarez Pol, Hector Rodríguez-Sánchez, Jose Luis Russotto, Paolo Wang, Yanzhao R3B@FAIR 10.5281/ZENODO.17011931 English The AsyEOS (Asymmetric-matter Equation-Of-State) directory within the R3BRoot framework provides the full detector definitions, Monte Carlo simulation tools, and digitization algorithms for the detectors used in the AsyEOS/R3B (Reactions with Relativistic Radioactive Beams) experimental campaign at the GSI/FAIR (Facility for Antiproton and Ion Research) facility. AsyEOS-R3BRoot, developed on top of the FairRoot framework, is a versatile toolkit for performing Monte Carlo simulations and processing experimental data to measure the flows of neutrons and light charged particles produced in Nucleus-Nucleus collisions in order to investigate symmetry energy of the nuclear equation of state at densities above the saturation one. The AsyEOS software package is a source distribution with recurring releases for macOS and Linux. PUB:(DE-HGF)33, ; 6, ; Geant4 c-plus-plus cmake vmc modular Track reconstruction Simulation Data analysis Structure and dynamics of nuclei Nuclear reactions Equation of state AsyEOS/R3B experiments GSI/FAIR facility Software 2025 GSI-2026-00041 2025 https://repository.gsi.de/record/363831 https://doi.org/10.5281/ZENODO.17011931