Limit On Production Of Charmed Particles In Association With J

M. Binkley,I. Gaines,J. Peoples,B. Knapp, W. Lee,P. Leung,S. Smith,A. Wijangco,J. Knauer,D. Yount,J. Bronstein,R. Coleman,G. Gladding,M. Goodman,M. Gormley,R. Messner,T. O'Halloran,J. Sarracino,A. Wattenberg

PHYSICAL REVIEW LETTERS（1976）

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Abstract

We have searched for charmed particles produced hadronically in coincidence with the $J$ particle by looking for muons from the leptonic or semileptonic decays of the charmed particles. In a sample of 2500 $J'\mathrm{s}$, we see no muons above the level expected from $\ensuremath{\pi}$ and $K$ decays.

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Key words

elementary particles,weak interaction,cross section

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