Search for W' (or techni-rho) to WZ

We search for new exotic particles decaying to the $WZ$ final state with electrons and muons using 1.15~fb$^{-1}$ of $\sqrt{s}=7$~TeV data collected by the CMS experiment at the LHC in 2011. No significant excess is observed in the mass distribution of the $WZ$ candidates compared to the background expectation from Standard Model processes. Lower bounds at the 95\% confidence level are set on the mass of hypothetical particles decaying to the $WZ$ final state in several theoretical models. Assuming the Sequential Standard Model, we exclude $\ensuremath{W^{\prime}}\xspace$ bosons with masses below 784~GeV. For Technicolor, we exclude $\ensuremath{\rho_{TC}}\xspace$'s with masses below 382 GeV in the parameter space $M(\ensuremath{\pi_{TC}}\xspace)=\frac{3}{4}M(\ensuremath{\rho_{TC}}\xspace) - 25$~GeV. We also exclude $\ensuremath{\rho_{TC}}\xspace$'s with masses below 436~GeV in the parameter space $M(\ensuremath{\rho_{TC}}\xspace) < M(\ensuremath{\pi_{TC}}\xspace) + M_W$. These are the strongest limits to date in this channel.