Constraints on the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi><mml:mi>t</mml:mi><mml:mi>b</mml:mi></mml:math>vertex from early LHC data

We use the recent measurements of top quark decay asymmetries in ATLAS and the $t$-channel single top cross section in CMS to set the first combined LHC limits on the $Wtb$ vertex. This combination allows us to obtain much better limits than the separate measurements. The resulting constraints are comparable, although still weaker, than the ones obtained using Tevatron data with much more statistics.