Search for Low Mass b' Production in CMS

The new energy regime that becomes accessible at the LHC will allow to extend the search region for 4th generation of quarks and leptons beyond existing constraints. The study reported in this note covers the low-mass $b'$ search region assuming that the flavor-changing neutral-current decay $b' \to bZ$ is allowed. Using leading order cross section for $b'$ production, we determine the significance expected for an observation at up to $1$/fb data at $\sqrt{s} = 10$ TeV. In the absence of a discovery, 95\% confidence level exclusion limits are presented as well.