Measurement of top quark properties at D0

Abstract

— We present a summary of the measurements of the top quark production and decay properties performed by the D0 experiment at the Fermilab Tevatron proton-antiproton collider at √ s = 1.96 TeV using 1 fb of data. We discuss the first simultaneous measurement of the ratio of branching fractions, R = B(t → Wb)/B(t → Wq), with q being a d, s, or b quark, and the top quark pair production cross section σtt̄, the first model-independent measurement of the helicity of W bosons produced in the top quark decays, and the first measurement of the integrated forward-backward charge asymmetry in the production of tt̄ pairs.