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Search
VOLUME 30 (1979) | ISSUE 6 | PAGE 369
Search for long-lived heavy particles in π- U interactions at 55-GeV/c incident momentum
The effective mass spectrum of Κττ systems produced in the reaction π ~ Ό -+K τπ± -f ... at 55-GeV/c incident momentum was investigated for the purpose of searching for heavy mesons with a lifetime of 10 ~12 to 10 ~10 sec. Narrow resonances were not observed in the 1.3-2.3-GeV mass region of the Kir systems. Upper limits for the production cross sections of D 0 mesons were estimated.