Extended Data Fig. 1: Measured spin structure function systematic uncertainties.
From: Proton spin structure and generalized polarizabilities in the strong quantum chromodynamics regime
The results are given in %. Systematic uncertainties arise from the target dilution factor f, from beam and target polarizations Pb and Pt, radiative corrections ΔσRC and Δσtail, the g1/g2 inputs into eq. (8), and dΩdE’, the error on the unpolarized cross section model. Systematic contributions from the out of plane polarization angle θOoP and the adjustment of the structure functions to constant Q2 were evaluated and found to contribute < 1% to the total systematic error. Reported values are typical of values around the Δ(1,232) resonance. The columns indicate the systematic associated with each individual Q2 kinematic setting, as indicated in the first row. †Longitudinal kinematic setting.
