We have measured the fraction of J/psi mesons originating from chi(c) meson decays in p (p) over bar collisions at root s = 1.8 TeV. The fraction, for P-T/(J/psi) > 4.0 GeV/c and (eta) over dot(J/psi) < 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/psi mesons originating from chi(c) decays and for directly produced J/psi mesons. We have found that direct J/psi production is in excess of the prediction of the color singlet model by the same factor found for direct psi(2S) production.
Production of J/psi mesons from chi(c) meson decays in p(p)over-bar collisions at root s=1.8 TeV
INTROZZI, GIANLUCA;
1997-01-01
Abstract
We have measured the fraction of J/psi mesons originating from chi(c) meson decays in p (p) over bar collisions at root s = 1.8 TeV. The fraction, for P-T/(J/psi) > 4.0 GeV/c and (eta) over dot(J/psi) < 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/psi mesons originating from chi(c) decays and for directly produced J/psi mesons. We have found that direct J/psi production is in excess of the prediction of the color singlet model by the same factor found for direct psi(2S) production.File in questo prodotto:
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