Search for a heavy gauge boson $W$ ' in the final state with an electron and large missing transverse energy in $pp$ collisions at $s=7$ TeV

A search for a heavy gauge boson W′ has been conducted by the CMS experiment at the LHC in the decay channel with an electron and large transverse energy imbalance E^(miss)_T, using proton–proton collision data corresponding to an integrated luminosity of 36 pb^(−1). No excess above standard model expectations is seen in the transverse mass distribution of the electron-E^(miss)_T system. Assuming standard-model-like couplings and decay branching fractions, a W′ boson with a mass less than 1.36 TeV/c^2 is excluded at 95% confidence level.