Combination of searches for anomalous top quark couplings with 5.4 fb^-1   of ppbar collisions
  We present measurements of the tWb coupling form factors using information from electroweak single top quark production and from the helicity of W bosons from top quark decays in ttbar events. We set upper limits on anomalous tWb coupling form factors using data collected with the D0 detector at the Tevatron ppbar collider corresponding to an integrated luminosity of 5.4 fb^-1. 
D0 Collaboration
hep-ex