Search for Heavy Particles Decaying into Electron-Positron Pairs in pp̅ Collisions

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Gregory R. Snow, University of Nebraska-LincolnFollow
D0 Collaboration

Date of this Version

8-6-2001

Comments

Published by American Physical Society. Phys. Rev. Lett. VOLUME 87, NUMBER 6 (2001). http://prl.aps.org. Copyright © 2001 American Physical Society. Used by permission.

Abstract

We present results of searches for technirho (ρ_T), techniomega (ω_T), and Z ′ particles, using the decay channels ρ_T, ω_T, Z ′ → ℯ⁺ℯ^-. The search is based on 124.8 pb^-1 of data collected by the D0 detector at the Fermilab Tevatron during 1992–1996. In the absence of a signal, we set 95% C.L. upper limits on the cross sections for the processes pp̅ → ρ_T, ω_T, Z ′ → ℯ⁺ℯ^- as a function of the mass of the decaying particle. For certain model parameters, we exclude the existence of degenerate ρ_T and ω_T states with masses below about 200 GeV. We exclude a Z ′ with mass below 670 GeV, assuming that it has the same couplings to fermions as the Z ′ boson.