Production of J/Ψ via Ψ' and χ decay in 300 GeV/c proton-and π±-nucleon interactions

The production of the χ 1 and χ 2 states of charmonium has been observed in 300 GeV/c π ± and pN interactions. The fraction of the total inclusive J/ψ production due to radiative χ decay has been determined to be 0.40±0.04, 0.37±0.03, and 0.30±0.04 for the π + , π - , and proton data, respectively. Total cross sections for χ 1 and χ 2 production of 131±18±14 and 188±30±21 nb/nucleon in the 300 GeV/c π - N interactions have been obtained