2011 QCD and High Energy Interactions - Rencontres de Moriond ...

Figure 5: Summary of most recent CDF t¯t cross
section measurements.
Figure 6: Summary of most recent D0 t¯t cross section
measurements.
cross section has been measured in all possible decay channels, with precision comparable to
the theoretical one. These measurements, which are all in good agreement with SM predictions,
are important as tests of pQCD calculations and to precisely determine the background to new
physics searches. Thanks to the high statistic samples and the use of very efficient multivariate
analysis techniques, the precision of the results is currently limited by the systematic uncertainties:
both collaborations are working to understand them better and reduce them by means of
constraints to the data.
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