Search for W' 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^' decaying into an electron and a neutrino. The data were collected with the D0 detector at the Fermilab Tevatron pp¯ Collider at s=1.96TeV, and correspond to an integrated luminosity of about 1fb^-1. Lacking any significant excess in the data in comparison with known processes, an upper limit is set on σ_W^'×B(W^'→eν), and a W^' 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.