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1.2     ! uid12904    1: We present a new measurement of $p\bar p \to t \bar tX$ production 
1.1       uid12904    2: at $\sqrt{s}=1.96$ TeV using 4951.86 pb$^{-1}$ of data collected with the
1.2     ! uid12904    3: D0 detector between 2002 and 2010. We focus on the final state
1.1       uid12904    4: where the $W$ boson from one of the top quarks decays into a 
1.2     ! uid12904    5: $\tau$ lepton and its associated neutrino, while the other $W$ boson decays into 
1.1       uid12904    6: a quark-antiquark pair. We aim to select those events in which the
1.2     ! uid12904    7: $\tau$ lepton subsequently decays hadronically, meaning to one or more charged hadrons, zero
        !             8: or more neutral hadrons and a tau neutrino. We train a topological neural network 
        !             9: as the method to enhance signal over the background. For a top quark
        !            10: mass of 172.5 GeV we measure the cross section to be:
1.1       uid12904   11: 
                     12: \begin{center}\[\sigma (t\overline{t}) = 
1.2     ! uid12904   13: 8.46\;\;_{-1.04}^{+1.06}\;\;({\textrm{stat}})\;\;_{-0.78}^{+0.84}\;\;({\textrm{syst}})\;\;\pm 0.3\;\;({\textrm{lumi}})\;\; \rm{pb.}\]
1.1       uid12904   14: \par\end{center}
                     15: