Search forZ′→e+e−Using Dielectron Mass and Angular Distribution

We search for $Z^{\prime }$ bosons in dielectron events produced in $p\overline{p}$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$, using $0.45{\mathrm{fb}}^{-1}$ of data accumulated with the Collider Detector at Fermilab II detector at the Fermilab Tevatron. To identify the $Z^{\prime }\to e^{+}{e}^{-}$ signal, both the dielectron invariant mass distribution and the angular distribution of the electron pair are used. No evidence of a signal is found, and 95% confidence level lower limits are set on the $Z^{\prime }$ mass for several models. Limits are also placed on the mass and gauge coupling of a generic $Z^{\prime }$, as well as on the contact-interaction mass scales for different helicity structure scenarios.