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Von Toerne, E; Vorwerk, V; Voutilainen, M; Wagner, R; Wahl, HD; Wang, L; Wang, MHLS; Warchol, J; Watts, G; Wayne, M; Weber, M; Weber, G; Welty-Rieger, L; Wenger, A; Wermes, N; Wetstein, M; White, A; Wicke, D; Wilson, GW; Wimpenny, SJ; Wobisch, M; Wood, DR; Wyatt, TR; Xie, Y; Yacoob, S; Yamada, R; Yan, M; Yasuda, T; Yatsunenko, YA; Yip, K; Yoo, HD; Youn, SW; Yu, J; Zatserklyaniy, A; Zeitnitz, C; Zhao, T; Zhou, B; Zhu, J; Zielinski, M; Zieminska, D; Zieminski, A; Zivkovic, L; Zutshi, V; Zverev, EG; - view fewer (2008) Search for excited electrons in p(p)over-bar collisions at root s=1.96 TeV. PHYSICAL REVIEW D , 77 (9) , Article ARTN 091102. 10.1103/PhysRevD.77.091102.

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Abstract

We present the results of a search for the production of an excited state of the electron, e*, in proton-antiproton collisions at √s=1.96  TeV. The data were collected with the D0 experiment at the Fermilab Tevatron Collider and correspond to an integrated luminosity of approximately 1  fb-1. We search for e* in the process pp̅ →e*e, with the e* subsequently decaying to an electron plus photon. No excess above the standard model background is observed. Interpreting our data in the context of a model that describes e* production by four-fermion contact interactions and e* decay via electroweak processes, we set 95% C.L. upper limits on the production cross section ranging from 8.9 to 27 fb, depending on the mass of the excited electron. Choosing the scale for contact interactions to be Λ=1  TeV, excited electron masses below 756 GeV are excluded at the 95% C.L.

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