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The reaction ^ + Ta-> V° + X( V° = A, A, or K s°) at 4 GeV/chas been studied by comparing with the results in pp interaction. _Strong enhancement of A production was observed, while A production is suppressed. The A/A production ratio is obtained as (2.0 ±1.0) x 10" 2 . A reveals evaporationlike behavior with a nuclear temperature of 97 MeV. Evaporationlike behavior with a temperature of 135 MeV, but via a short-range process, was observed also in K® production.

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