Uncertainty Quantification in Breakup Reactions

TL;DR

This paper introduces a Bayesian framework to quantify uncertainties in breakup reaction models, specifically using the continuum discretized coupled channel method, enhancing the interpretation of experiments on loosely bound nuclei.

Contribution

First Bayesian analysis applied to a breakup reaction model, integrating statistical methods with a three-body reaction model to assess parameter uncertainties.

Findings

Quantified uncertainties in breakup observables due to model parameters

Developed a Bayesian approach applicable to complex reaction models

Enabled more reliable interpretation of experimental data on halo nuclei

Abstract

Breakup reactions are one of the favored probes to study loosely bound nuclei, particularly those in the limit of stability forming a halo. In order to interpret such breakup experiments, the continuum discretized coupled channel method is typically used. In this study, the first Bayesian analysis of a breakup reaction model is performed. We use a combination of statistical methods together with a three-body reaction model (the continuum discretized coupled channel method) to quantify the uncertainties on the breakup observables due to the parameters in the effective potential describing the loosely bound projectile of interest. The combination of tools we develop opens the path for a Bayesian analysis of not only breakup processes, but also a wide array of complex processes that require computationally intensive reaction models.