Status of the CHORUS experiment

The CHORUS experiment at CERN searches for nu /sub mu / implies /implied by nu /sub tau / oscillations by looking for tau decays from charged-current nu /sub tau / interactions. The emulsion target of the detector, having a resolution of about a micron, enables the detection of the decay topology of the tau . After having analyzed a sample of 126000 events containing an identified muon and 7500 purely hadronic events, no nu /sub tau / candidate has been found. This result translates in a limit on the mixing angle sin/sup 2/2 theta /sub mu tau /<8*10/sup -4/ at 90% C.L. for large Delta m/sub mu tau //sup 2/. (12 refs).