Search for high-mass resonances decaying to ttbar in the electrons+jets channel

We perform a model-independent search for the production of a narrow heavy resonance with mass greater than 1 $\TeV$ decaying into top quark pairs in 7 TeV pp collisions at the LHC. Using a dataset of $4.33 \pm 0.20\;\rm fb^{-1}$ recorded with the CMS experiment, we select events containing one electron, missing transverse energy, and at least two jets and look for an excess of events above standard model background prediction in the top quark pair invariant mass spectrum. The high transverse momenta of the top quarks originating from such decays result in an event topology which requires a dedicated event selection and reconstruction of the invariant top quark pair mass. In absence of evidence for a signal, we evaluate 95\% C.L. upper limits on $\sigma(\pp \rightarrow \Zprime \rightarrow \rm t\bar t)\cdot \rm BR$ as a function of the invariant mass of the resonance.