Extended Data Fig. 1: Correlator fit quality and stability.
From: A per-cent-level determination of the nucleon axial coupling from quantum chromodynamics
a–c, Fit results for the effective mass (meff), axial (\({g}_{{\rm{A}}}^{{\rm{eff}}}\)) and vector (\({g}_{{\rm{V}}}^{{\rm{eff}}}\)) Feynman–Hellmann ratios overlayed on top of correlator data. The black and white filled data points are ground state values determined by subtracting the excited state contributions from the raw correlation functions under bootstrap resampling. d, The distribution of gA/gV after 5,000 bootstrap resamplings. The green-shaded regions correspond to the 68% (dark green) and 95% (light green) confidence intervals. All 5,000 bootstraps are shown, with no evidence of outliers. e, f, Stability of the correlation function analysis under varying tmin and tmax for meff, \({g}_{{\rm{A}}}^{{\rm{eff}}}\) and \({g}_{{\rm{V}}}^{{\rm{eff}}}\).The corresponding P values are shown in the bottom panel. The preferred simultaneous fit is highlighted by the solid black symbols. Uncertainties are one s.e.m.
