Possible inconsistency between phenomenological and theoretical determinations of charge symmetry breaking in nuclear energy density functionals

TL;DR

This paper reviews recent progress in determining the charge symmetry breaking term in nuclear energy density functionals, highlighting a significant discrepancy between theoretical and phenomenological values that remains unresolved.

Contribution

It identifies and discusses the inconsistency between theoretical and phenomenological determinations of the charge symmetry breaking term in nuclear energy density functionals.

Findings

Theoretical estimates of the charge symmetry breaking term are much smaller than phenomenological ones.

The discrepancy between the two approaches is an open question in nuclear physics.

Progress has been made in recent determinations, but the core inconsistency persists.

Abstract

We summarize the recent progress on the determination of the charge symmetry breaking term of nuclear energy density functionals. We point out that the strength of the term determined theoretically is remarkably smaller than that determined phenomenologically, which is still an open question.