We have measured the fraction of J/ψ mesons originating from χc meson decays in pp̅ 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.
Production of J/ψ Mesons from χc Meson Decays in pp̅ Collisions at √s = 1.8 TeV
PAGLIARONE, Carmine Elvezio;
1997-01-01
Abstract
We have measured the fraction of J/ψ mesons originating from χc meson decays in pp̅ 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.File in questo prodotto:
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