Search for Type III seesaw from pp collisions at 7 TeV

A search for states from fermionic triplet, expected in Type III seesaw model, in pp collisions at $\sqrt{s}=7$ TeV with three isolated leptons and an imbalance in transverse momentum is presented. The data, collected with the CMS detector at the LHC, correspond to an integrated luminosity of 4.9 fb$^{-1}$. No excess of events is observed relative to the background predicted by the standard model. The results are interpreted in terms of limits on parameters of the Type III seesaw model.