ttbar Cross Section with Secvtx Double Tags


Result: We measure the ttbar cross section in the lepton+jets channel using secvtx double tags. This analysis uses the subset of the events in the inclusive Vertex tag cross section measurement. The advantage of the double tag technique is that the backgrounds are greatly reduced and there is little systematic uncertainty on the cross section due to our understanding of the backgrounds.


We measure a cross section of 5.4 +2.4-1.9 (stat) +1.1-0.9 (syst) pb