Production of J/ψ Mesons from χc Meson Decays in pp¯ Collisions at √s = 1.8 TeV
Abstract
We have measured the fraction of J/ψ mesons originating from χc meson decays in pp¯ collisions at s = 1.8 TeV. The fraction, for PJ/ψT>4.0 GeV/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.
- Publication:
-
Physical Review Letters
- Pub Date:
- July 1997
- DOI:
- 10.1103/PhysRevLett.79.578
- Bibcode:
- 1997PhRvL..79..578A