Extended Data Fig. 2: Mass radius and trace anomaly.
From: Determining the gluonic gravitational form factors of the proton
Left panel: The extracted radius as a function of the photon energy according to ref. 9 together with the GlueX result. Both our and the GlueX extractions used a dipole fit of the form factor. The charge radius from CODATA and the latest electron scattering6 (labeled PRad) are plotted as lines with error bands. The lattice result12 is plotted as a grey line with grey error band. Right panel: The extracted Ma/M according to Ji’s mass decomposition40 following32 along with a recent direct lattice calculation of the same quantity41.
