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Abstract
Recent measurements of top-quark properties at the Tevatron are presented. CDF uses data corresponding up to 9.0 fb−1 to measure the ratio R of the branching fractions , the branching fraction for top-quarks decaying into τ leptons and the cross section for the production of an additional γ in tt̄ production. The results from all these measurements agree well with their respective Standard Model expectation. DØ uses 5.3 fb−1 of data to measure the tt̄ cross section as a function of the time. A time dependency would imply Lorentz invariance violation as implemented by the Standard Model extension. No time dependency is observed and DØ sets first limits in the top-quark sector for Lorentz invariance violation. DØ also determines indirectly the top quark width using the results of earlier measurements at DØ. The measured top quark width is in agreement with the SM expectation and does not show any hints for new physics contributions.
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