We report on a high-statistics search for the Θ(1540) + resonance in Σ − -nucleus collisions at 340 GeV/c . No evidence for this resonance was found in our data sample which contains 13 millions K 0 s → π + π − decays above background. For the decay channel Θ + → K 0 s p and the kinematic range xF > 0.05 we find the production cross section to be BR(Θ + → K 0 s p) • σ0 < 1.8 µb per nucleon at 99% CL.
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