Search forW′Bosons Decaying to an Electron and a Neutrino with the D0 Detector

This Letter describes the search for a new heavy charged gauge boson $W^{\prime }$ decaying into an electron and a neutrino. The data were collected with the D0 detector at the Fermilab Tevatron $p\overline{p}$ Collider at $\sqrt{s}=1.96\mathrm{TeV}$, and correspond to an integrated luminosity of about $1{\mathrm{fb}}^{-1}$. Lacking any significant excess in the data in comparison with known processes, an upper limit is set on ${\sigma }_{W^{\prime }}\times B(W^{\prime }\to e\nu )$, and a $W^{\prime }$ boson with mass below 1.00 TeV can be excluded at the 95% C.L., assuming standard-model-like couplings to fermions. This result significantly improves upon previous limits and is the most stringent to date.