Production of $J / \psi$ via $\psi^{\prime}$ and $X$ Decay in 300-GeV/c Proton and $\pi^{\pm}$ Nucleon Interactions

The production of the χ1 and χ2 states of charmonium has been observed in 300 GeV/c π±N 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 have been obtained of 131±18±14 and 188±30±21 nb/nucleon in the 300 GeV/c π−N interactions for χ1 and χ2 production. By measuring the contributions to the J/ψ production due to both ψ’ and radiative χ decay, the cross sections for direct J/ψ production have been determined to be 97±14, 102±14, and 89±12 nb/nucleon for π+, π−, and protons, respectively.

p nucleus: inclusive reaction
anti-p nucleus: inclusive reaction
pi nucleus: inclusive reaction
lithium
charmonium
quarkonium: hadroproduction
hadroproduction: quarkonium
chi mesons: radiative decay
radiative decay: chi mesons
psi(3685): hadronic decay

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Figures(0)

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Production of J/ψJ / \psiJ/ψ via ψ′\psi^{\prime}ψ′ and XXX Decay in 300-GeV/c Proton and π±\pi^{\pm}π± Nucleon Interactions

Citations per year

Production of $J / \psi$ via $\psi^{\prime}$ and $X$ Decay in 300-GeV/c Proton and $\pi^{\pm}$ Nucleon Interactions