Measurement of the pp‾→tt‾ +X production cross section at √s=1.96 TeV in the fully hadronic decay channel

2007
A measurement of the top quark pair productioncross section in proton antiprotoncollisions at an interaction energyof sqrt(s)=1.96 TeV is presented. This analysis uses 405±25 pb-1 of data collected with the D0 detector at the Fermilab TevatronCollider. Fully hadronic t[ overlinet] decays with final states of six or more jets are separated from the multijet background using secondary vertex tagging and a neural network. The t[ overlinet] cross section is measured as sigmat[ overlinet]=4.5-1.9+2.0(stat)-1.1+1.4(syst)±0.3(lumi) pb for a top quarkmass of mt=175 GeV/c2.
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