Search for a W' or techni-rho decaying into WZ in pp collisions at sqrt(s) = 7 TeV

A search is performed in pp collisions at √ s = 7 TeV for exotic particles decaying via WZ to final states with electrons and muons. The data sample corresponds to an integrated luminosity of approximately 5 fb−1. No significant excess is observed in the data above the expected standard model background. Upper bounds at 95% confidence level are set on the production cross section of the W ′ boson described by the sequential standard model, and on the W ′ WZ coupling. W ′ bosons with masses below 1143 GeV are excluded. Limits are also set in the context of low-scale technicolor models, under a range of assumptions concerning the model parameters. Submitted to Physical Review Letters ∗See Appendix A for the list of collaboration members ar X iv :1 20 6. 04 33 v2 [ he pex ] 2 5 Ja n 20 13