a Observed and expected limit (95 % CL) on the coupling of the vector-like quark to the SM



boson and
b-quark as a function of the
Q mass, where the BR(



) is assumed to be 50 %. The excluded region is given by the area above the
solid black line.
b Observed and expected limit (95 % CL) on the mixing of a singlet vector-like
T quark to the SM sector, where the BR(



) is assumed to be that of a singlet. The excluded region is given by the area above the
solid black line. The limits are shown compared to the indirect electroweak constraints from Ref. [] (
green and
red line). In addition, the observed limits from pair-production searches by ATLAS [] (
olive) and CMS [] (
blue) are shown