We have looked into the kinematic distributions for events in the W+2 jet bin. We have also looked at the W+1 jet bin in the case where the W+2 jet distributions looked more "weird". A KS test was done to compare the data to the expectations from top plus backgrounds for each distribution. These distributions can be found here. Note that most of the excess shows at low W transverse mass and Ht < 200 GeV. These events will be cut in the cross section analysis.

Tables with all the events in the Gen5 W + >= 3 jet sample are here. These events are for the unoptimized analysis without the W transverse mass cut and the Ht cut. The last column indicates if the event was already present in the Gen4 analysis: "--" means that the run was not available in the Gen4 analysis. A number is used for events that migrate to a lower jet bin to indicate the jet bin where this event was in the Gen4.

These plots compare the extra gen5 tags with the common gen4/gen5 tags in the same 162 pb-1 data range.We also compare the new gen5 tags with the ttbar MC expectations. The plots include KS probabilities for these two comparisons. There are no distributions in which the extra events look drastically different from the common events. The vertex mass has the lowest KS probability, but it is around 3%, and the probability that one out of eighteen plots has a low KS probability is pretty high. There are also no distributions that look drastically different from the Monte Carlo predictions, although that should be taken with a grain of salt since we neglect the backgrounds and the fact that tags in MC look different than in the data in some distributions. However, there are no gross problems.

The transverse mass plot for all events in the signal region can be found in the Plots for Blessing page. The plot compares the W transverse mass for the analysis without Ht or Mt cuts. The plot shows the same distribution for the final signal dataset when we include the Ht and Mt cuts.