2005/10/02 by Lucio Cerrito, Cerrito, Lucio, L. Cerrito
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ex
paper · pdf · doi:10.48550/arxiv.hep-ex/0510002
4 pages, 2 figures, to appear in the proceedings of the International Europhysics Conference on High Energy Physics, Lisboa, Portugal 2005
arxiv created 2005/10/02 · arxiv updated 2019/08/13
We present two measurements of the ttbar production cross section in collisions of protons and antiprotons at sqrts=1.96 TeV. We analyze a dataset of 310+/-20 pb-1 collected with the CDF2 detector. In the first measurement, we select events with six to eight jets, at least one of which having a displaced secondary vertex, little or no missing transverse energy and optimized kinematical criteria consistent with the ttbar all-hadronic decay channel. In the second measurement, we select events with four or more jets, at least one of which having a displaced secondary vertex, high missing transverse energy, and optimized kinematical criteria consistent with the decay of ttbar to tau+jets. The averaged ttbar production cross section, determined from six different measurements using the CDF2 detector in the dilepton, lepton+jets and all-hadronic decay channels, is also calculated to be sigmattbar=7.1+/-0.6 (stat)+/-0.7(syst)+/-0.4 (lumi) pb, in agreement with the prediction of the standard model.