"Figure 3c" of "Search for the single production of vector-like quarks decaying into a W boson and a b quark using single-lepton final states in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

The reconstructed mass distribution for category 1b jet, tight, e-,mu-, showing the data (points), the simulated SM backgrounds (colored histograms), and the signal predictions for Y quark production (black dashed histogram) for a Y quark mass of 1.2 TeV. The coupling parameter kappaW is set to 0.1. The vertical bars on the data points represent the statistical uncertainty in the data. The hatched area in the upper panels represents the post-fit systematic uncertainties. The lower panels show the pulls as hatched bars, defined as the difference between the data and the fitted SM background predictions divided by the total uncertainty sigma.