A First Principles Solution to Developing an Adaptable W-Value Parameter in NEST

The Noble Element Simulation Technique (NEST) is a C++ package with optional GEANT4 integration and a Python equivalent (nestpy) with a strong track record of accurately simulating the scintillation, ionization, and electroluminescence processes in xenon and argon - elements key to understanding rare event searches such as those for neutrinoless double beta decay and dark matter. Using a combination of empirical and first principle methods, NEST models the intrinsic physics of noble detectors while maintaining a format that is accessible and customizable for users. On behalf of the NEST collaboration, I will present key outputs including energy resolution and light and charge yields of various interactions with noble elements. I will also discuss my personal contributions to the code addressing the discrepancy between NEST and recent publications on the W-value. This work utilizes a modified Thomas Imel Box Model as a first principles solution to making NEST readily adaptable to future experiments.