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.
1997
Esperti anonimi
Inglese
Internazionale
STAMPA
79
578
583
5
Particle physics, High energy physics
465
info:eu-repo/semantics/article
262
F., Abe; H., Akimoto; A., Akopian; M. G., Albrow; S. R., Amendolia; D., Amidei; J., Antos; S., Aota; G., Apollinari; T., Asakawa; W., Ashmanskas; M., ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/577579
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