Search for excited electrons using the ZEUS detector

This paper reports a search for excited electrons at the HERA electron-proton collider. In a sample corresponding to an integrated luminosity of 26 nb<sup>−</sup>, no evidence was found for any resonant state decaying into e<sup>−</sup>γ, νW<sup>−</sup> or e<sup>−</sup>Z0. Limits on the coupling strength of an excited electron have been determined for masses between 45 and 225 GeV. This study also reports the observation of the wide-angle eγ Compton scattering process