The production of J/ψ and associated particles in the collision of 530 GeV/c protons and pions with nuclear targets

We have studied the production of the J/ψ and associated particles using the E672/E706 spectrometer at Fermilab. Preliminary results are presented from the first run in 1987--1988 with 530 GeV/c p/π+ and π- beams on a variety of nuclear targets. The A-dependance of J/ψ production with π- beam was found to agree with an Aα parametrization with α = 0.85 ± 0.06 for XF > 0.1. We have found that (41 ± 22)% of the J/ψ's produced in the p/π+ beam are consistent with the radiative decay χ →J/ψ+γ. The future analysis goals of the experiment are also discussed. 10 refs., 9 figs