Production of J/ψ Mesons from χc Meson Decays in pp¯ Collisions at s=1.8TeV

F. Abe et al. (CDF Collaboration)
Phys. Rev. Lett. 79, 578 – Published 28 July 1997
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Abstract

We have measured the fraction of J/ψ mesons originating from χc meson decays in pp¯ collisions at s=1.8TeV. The fraction, for PTJ/ψ>4.0GeV/c and |ηJ/ψ|<0.6, not including contributions from b flavored hadrons, is 29.7%±1.7%(stat)±5.7%(syst). We have determined the cross sections for J/ψ mesons originating from χc decays and for directly produced J/ψ mesons. We have found that direct J/ψ production is in excess of the prediction of the color singlet model by the same factor found for direct ψ(2S) production.

  • Received 7 February 1997

DOI:https://doi.org/10.1103/PhysRevLett.79.578

©1997 American Physical Society

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Vol. 79, Iss. 4 — 28 July 1997

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