Search for a heavy bottom-like quark in pp collisions at √{ s} = 7 TeV

A search for pair-produced bottom-like quarks in pp collisions at √{ s} = 7 TeV is conducted with the CMS experiment at the LHC. The decay b^‧ → tW is considered in this search. The b^‧bbar^‧ →tW^-tbarW⁺ process can be identified by the distinctive signature of trileptons and same-sign dileptons. With a data sample corresponding to an integrated luminosity of 34 pb^-1, no excess above the standard model background predictions is observed and a b^‧ quark with a mass between 255 and 361 GeV /c² is excluded at the 95% confidence level.