Limit on Production of Charmed Particles in Association with the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi></mml:math>

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.