Worked on the AliceO2Group/AliceO2 repository to enhance the accuracy of particle physics simulations, focusing on the fidelity of decay processes within the O2MCApplication.cxx module. Addressed a specific bug by correcting the decay branch ratio for antihyperhelium4sigma, ensuring that simulation parameters aligned with updated physical models. This targeted fix improved the reliability of downstream analyses by reducing discrepancies in simulated decay outcomes. The work emphasized correctness in physical modeling over new feature development, utilizing C++ for both implementation and debugging. Applied expertise in C++ development, particle physics, and physics simulation to support more precise and stable simulation results.