Abstract submitted to the
         XXXth International Conference on High Energy Physics
                July 27 - August 2, 2000, Osaka, Japan
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                Search for events with isolated high-energy leptons
                     and missing transverse momentum at HERA

                    
                               ZEUS Collaboration





                                    Abstract


A search for events containing high-transverse-momentum isolated tracks
with large missing transverse momentum has been performed with the ZEUS
detector at HERA using 82 pb^-1 of integrated luminosity collected during
the period 1994-1999. The number of observed events, seven e^\pm and four
muons, is consistent with the expections from Standard Model processes.
The kinematic variables of the events lie in the region predicted by
the Standard Model. The excess of such events reported by the H1
collaboration is therefore not confirmed by the ZEUS data.