Inside the Black Box of Big Bang Nucleosynthesis: Parameter Sensitivity Studies in Light of new LBT Data
This study presents a comprehensive sensitivity atlas for Big Bang Nucleosynthesis using the PRyMordial code to quantify how 14 fundamental parameters and 63 reaction rates influence primordial abundances, incorporating new LBT helium-4 data to rank theoretical uncertainties and address the deuterium tension and lithium problem.