Azimuthal correlations between charmed particles produced in 230 GeV/c π−Cu interactions

Abstract In the CERN NA32 experiment a high-resolution silicon vertex detector and a purely topological approach were used to collect 642 events with two or more secondary vertices. They are consistent with double production of charm. Azimuthal angle correlations are studied for D 0 , D + , D s + and Λ c + ; we also investigate these correlations as a function of the number of leading D mesons.