Determine whether the Azuma and Tang spectra share the same underlying decay amplitude

Determine whether the Azuma and Tang measurements of the $^{16}$N beta-delayed alpha spectrum imply the same underlying decay amplitude, beyond their separate compatibility with a common strong alpha-$^{12}$C continuum.

Background

The paper analyzes the Azuma and Tang 16^{16}N beta-delayed alpha spectra using a common cluster-EFT description of the alpha-12^{12}C strong interaction. Independent fits show that the two spectra are separately compatible with nearly the same strong continuum, but simultaneous fits with a minimal common weak-current amplitude fail to reproduce both line shapes at the quality achieved independently.

This leaves unresolved whether the discrepancy originates from the experimental data, from the restricted weak-current parametrization, or from genuinely different decay amplitudes. The problem is included because establishing commonality is essential for combining these spectra with elastic scattering and radiative-capture constraints.

References

Nevertheless, the extent to which the Azuma and Tang spectra imply the same underlying decay amplitude has remained unresolved.

— Joint cluster-EFT analysis of $^{16}$N $β$-delayed $α$ spectra and $α$-$^{12}$C scattering  (2608.25252 - Park et al., 26 Aug 2026) in Section 1, Introduction

Such a calculation will determine whether the remaining Azuma--Tang difference is experimental or requires an extension of the weak amplitude.

— Joint cluster-EFT analysis of $^{16}$N $β$-delayed $α$ spectra and $α$-$^{12}$C scattering  (2608.25252 - Park et al., 26 Aug 2026) in Section 5, Discussion