Search for heavy generation down-type quark in the same-charge dilepton signature at CDF

Using data collected at the CDF detector in Run II at the Tevatron we present a search for pair production of heavy $b$-like quarks each of which decay to a top quark and a $W$ boson, yielding a $b\bar{b}WWWW$ final state. The mode in which two same-charge leptons are produced is very sensitive because while the signal branching ratio is reasonable, same-charge dilepton events are rare in the Standard Model. We also impose a $met$ and b-tag requirement. We present our preliminary results as well as future plans to improve our analysis.