Abstract
A search for exotic mesons has been carried out at the CERN Omega spectrometer. The baryon-exchange reaction π +p → Λ + x ++ was studied at 12 GeV/ c incident beam momentum. No evidence was found for the existence of doubly-charged strange mesons. The upper limit (95% confidence level) for this reaction is 60 nb for exotic mesons with squared masses from 1 to 7 (GeV/ c 2) 2 and 150 nb for 7 to 13 (GeV/ c 2) 2. These limits are of the same order of magnitude as the exotic cross-sections expected from two-component duality arguments.
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