Search for excited and exotic electrons in the eγ decay channel in p anti-p collisions at √s = 1.96 Tev

We present a search for excited and exotic electrons (e*) decaying to an electron and a photon, both with high transverse momentum. We use 202 pb-1 of data collected in p(bar p) collisions at √s = 1.96 TeV with the CDF II detector. No signal above standard model expectation is seen for associated ee* production. We discuss the e* sensitivity in the parameter space of the excited electron mass Me* and the compositeness energy scale Λ. In the contact interaction model, we exclude 132 GeV/c2 < Me* < 879 GeV/c2 for Λ = Me* at 95% confidence level (C.L.). In the gauge-mediated model, we exclude 126 GeV/c2 < Me* < 430 GeV/c2 at 95% C.L. for the phenomenological coupling f/Λ ∼ 10-2 GeV-1