Towards a global, uncertainty-quantified optical potential for rare isotopes

We present the first results of the East Lansing Model (ELM); a global, phenomenological, uncertainty-quantified, and Lane-consistent nucleon-nucleus optical potential, developed for extrapolating off of the line of beta-stability towards rare isotopes with controlled uncertainties. We discuss the choices made in 1) curating a corpus of experimental evidence from EXFOR including differential cross sections for (n,n) and (p,p) elastic scattering and (p,n) to the isobaric analog state on a variety of targets, 2) developing a phenomenological parameterization for the physical model, 3) developing a model for the likelihood that the physical model describes the evidence, and, finally, 4) performing a Bayesian calibration of the model. Finally, we demonstrate the performance of ELM compared to the state-of-the-art, highlighting unique features of ELM, especially with regards to its isovector component.