Recent results from the search by CHORUS for $\nu_{\mu} \to \nu_{\tau}$ oscillations

Results from the search for nu /sub mu / to nu /sub tau / oscillations by CHORUS are presented. Some of the data collected in 1994-1996 have been analysed, searching for nu /sub tau / charged current interactions followed by the decay of the tau lepton into a negative hadron or into a muon. Neutrino interaction vertices have been located in the emulsion target for 69,056 events with an identified final state muon and 7,206 events without an identified muon. Within the applied cuts: no nu /sub tau / candidate has been found. This result leads to a 90ž.L. limit P( nu /sub mu / to nu /sub tau /)<6.0.10/sup -4/ on the mixing probability. (10 refs).