Search for New Gauge Bosons in p¯p Collisions at s=1.8 TeV

We have searched for the production of a neutral gauge boson (Z′) with mass above 100 Gev/${\mathrm{c}}^2$ in p¯p collisions with the Collider Detector at Fermilab. We present a 95% confidence level (C.L.) limit on the Z′→${\mathrm{\mu }}^{+}$ ${\mathrm{\mu }}^{\mathrm{-}}$ production cross section. We combine the Z′ limit with that from our previous dielectron search; the combined result sets a limit of ${\mathrm{M}}_{\mathrm{Z}\prime }$>412 GeV/${\mathrm{c}}^2$ (95% C.L.), assuming standard-model coupling strengths. In addition, the absence of any evidence for an effective muon-quark contact interaction is used to set a lower limit of 1.6 TeV (95% C.L.) on an associated muon-quark compositeness scale.