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Charmonium production by 350 GeV/c negative pions incident on tungsten, copper and silicon has been studied in the WA92 experiment. J/ψ and ψ' mesons are identified through their decays into muon pairs and are selected in the Feynman-x range x F > 0. Inclusive J/ψ and ψ' cross-sections and J/ψ differential cross-sections as functions of x F and p T2 are measured....
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