Abstract
Phys.Rev.Lett.94:101802,2005 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 of
data collected in p-pbar collisions at sqrt(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 M(e*) and the compositeness energy scale Lambda. In the contact
interaction model, we exclude 132 < M(e*) < 879 GeV/c^2 for Lambda = M(e*) at
95% confidence level (C.L.). In the gauge-mediated model, we exclude 126 <
M(e*) < 430 GeV/c^2 at 95% C.L. for the phenomenological coupling f/Lambda ~
0.01/GeV.