par Acosta, Darin E.;De Lentdecker, Gilles 
; [et al.]
Référence Physical review. D, Particles, fields, gravitation, and cosmology, 71, 3, page (1-26), 032001
Publication Publié, 2005
; [et al.]Référence Physical review. D, Particles, fields, gravitation, and cosmology, 71, 3, page (1-26), 032001
Publication Publié, 2005
Article révisé par les pairs
| Résumé : | We present a new measurement of the inclusive and differential production cross sections of J/ψ mesons and b hadrons in proton-antiproton collisions at √s = 1960 GeV. The data correspond to an integrated luminosity of 39.7 pb-1 collected by the CDF run II detector. We find the integrated cross section for inclusive J/ψ production for all transverse momenta from 0 to 20 GeV/c in the rapidity range y < 0.6 to be 4.08 ± 0.02(Stat)-0.33+0.36(syst) μb. We separate the fraction of J/ψ events from the decay of the long-lived b hadrons using the lifetime distribution in all events with pT(J/ψ) > 1.25 GeV/c. We find the total cross section for b hadrons, including both hadrons and antihadrons, decaying to J/ψ with transverse momenta greater than 1.25 GeV/c in the rapidity range |
