Search for Excited and Exotic Electrons in the e γ Decay Channel in pp̅ Collisions at √s =1.96 TeV

Authors

Darin Acosta, University of FloridaFollow
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Collider Detector at Fermilab Collaboration

Date of this Version

3-18-2005

Comments

Published by American Physical Society. Phys. Rev. Lett. 94, 101802 (2005). http://prl.aps.org. Copyright © 2005 American Physical Society. Permission to use.

Abstract

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 pp̅ collisions at √s =1.96 TeV with the Collider Detector at Fermilab 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 Λ. In the contact interaction model, we exclude 132 GeV/c²e^*/c² for Λ =M_e^* at 95% confidence level (C.L.). In the gauge-mediated model, we exclude 126 GeV/c^-1e^*/c² at 95% C.L. for the phenomenological coupling f/ Λ ≈10^-2 GeV^-1.