The Quenched ${g_A}$ in Nuclei and Emergent Scale Symmetry in Baryonic Matter

Dichotomy of Baryons as Quantum Hall Droplets and Skyrmions In Compact-Star Matter

“…We recall as the density approaches the DLFP density, the constraints (12) require that the effective g A → 1. Surprisingly, as has been recently shown [25], the effective g eff A in Gamow-Teller transitions (most accurately measurable in doubly-magic nuclei) -which is denoted as g Landau A in [25] -is predicted to be "quenched" in the presence of emerging scale invariance from g A = 1.27 in free space to g eff A ≈ 1 at a much lower density, say, in finite nuclei. Now here is an intriguing possibility.…”

“…There is a possibility however that these terms will pick up Φ dependence due to certain corrections that go beyond the lowest approximation in scale-symmetry breaking (referred to as "LOSS") associated with the anomalous dimension of the gluon stress tensor. In fact it can have an impact on the celebrated g A quenching in nuclear Gamow-Teller transitions [25]. We ignore such contributions in what follows.…”