Limit on Production of Charmed Particles in Association with theJ

Authors: M. Binkley, I. Gaines, J. Peoples, B. C. Knapp, W. Lee, PingSun Leung, S. D. Smith, A. Wijangco, J. P. Knauer, D. Yount, J. Bronstein, R. Coleman, G. E. Gladding, M. C. Goodman, M. Gormley, R. Messner, T. O’Halloran, John Sarracino, A. Wattenberg - Physical Review Letters 1976 cited by 23

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.