The ratio of $\Sigma^{++}_\mathrm{EEC}$ to $\Sigma^{--}_\mathrm{EEC}$ in pp collisions as a function of $R_\mathrm{L}$ for 20–40, 40–60, and 60–80 GeV/$c$ charged-particle jets, along with predictions from five MC event generators. Statistical uncertainties on the data are shown as vertical lines, and systematic uncertainties as shaded boxes. Ratios to the data are shown in the second row, and the relative combined statistical and systematic uncertainties on the data are shown as shaded gray boxes surrounding the dashed unity line.