Broad composite resonances and their signals at the LHC

We explore the possibility that the left-handed third generation quark doublet $q_L$ is fully composite in composite Higgs models. The signature of the model is the presence of broad spin-1 resonances strongly interacting with the third generation quark doublet $q_L$. In this case, The $t\bar{t}$ resonance search channel is comparable in sensitivity to the di-lepton channel. In addition, the same-sign di-lepton channel in the $t\bar{t}\rho$ associate production can probe the large $g_\rho$ parameter space and complementary to the Drell-Yan production channels.