Fig. 2.

Reconstructed $cos{\mathit{\theta }}^{\ast }$ distributions for data and the SM background estimate in the dielectron (top) and dimuon (bottom) channels. Results are shown for the contact interaction signal region for dilepton masses between 400 GeV and 4500 GeV. Also shown are the predictions for a benchmark $\mathrm{\Lambda }$ value in the LR contact interaction model. The ratio is presented with the total systematic uncertainty overlaid as a band