We present two measurements of the t anti-t production cross section
in collisions of protons and antiprotons at s**(1/2) = 1.96 TeV. We analyze a
dataset of 310 +/- 20 pb-1 collected with the CDF 2 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 tt-bar 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 tt-bar to tau+jets. The averaged tt-bar production cross
section, determined from six different measurements using the CDF 2 detector
in the dilepton, lepton+jets and all-hadronic decay channels, is also
calculated to be signa_tt-bar = 7.1 +/- 0.6(stat) +/- 0.7(syst) +/-
0.4(lumi) pb, in agreement with the prediction of the standard model.
Return to top of page.
Go to Physics Results
Updated: Tuesday, 2006 August 01 09:58:44 CDT automatically from input from Carol Picciolo