Search for a W' boson via the decay mode W'-->munumu in 1.8 TeV pp collisions.

We report the results of a search for a W' bosonproduced in p-pbar collisions at a center-of-mass energy of 1.8 TeV using a 107 pb-1 data sample recorded by the Collider Detectorat Fermilab. We consider the decay channel W' -> mu nu and search for anomalous production of high transverse massmu-nu leptonpairs. We observe no excess of events above background and set limits on the rate of W' bosonproduction and decay relative to Standard ModelW bosonproduction and decay using a fit of the transverse massdistribution observed. If we assume Standard Modelstrength couplings of the W' bosonto quark and leptonpairs, we exclude a W' bosonwith invariant massless than 660 GeV/c**2 at 95% confidence level.