Extended Data Fig. 3: Continuum extrapolation of gA.
From: A per-cent-level determination of the nucleon axial coupling from quantum chromodynamics
The nucleon axial coupling as a function of \({\varepsilon }_{{\rm{a}}}^{2}={a}^{2}/(4{\rm{\pi }}{w}_{0}^{2})\), where a is the lattice spacing and w0 is a hadronic length scale used to normalize LQCD calculations. The physical pion-mass limit is displayed by the magenta band, with the central value indicated by the dashed magenta curve. Additional curves with suppressed uncertainty bands are plotted for mπ ≈ 130 MeV (solid), mπ ≈ 220 MeV (dashed), mπ ≈ 310 MeV (dot-dashed), mπ ≈ 350 MeV (dotted) and mπ ≈ 400 MeV (dot-dot-dashed). Uncertainties are one s.e.m.
