Search forD0(1865)Mesons Produced in Association with Prompt Muons in Hadronic Interactions

Abstract

We present the results of a search at Fermilab for the charmed meson, D°(1865), produced in association with a prompt muon by 300-GeV/c neutrons. We observe no significant enhancement in high-mass K ±r n* systems and report, at the 95% confidence level, an upper limit of 200 nb/nucleon for the production of a pair of charmed particles and their subsequent decay into a K 1^ state and a prompt muon.