J/ψJ/\psi production in ppˉp \bar{p} collisions at s\sqrt{s} = 1.8-TeV

Collaboration
Jan, 1996
11 pages
Published in:
  • Phys.Lett.B 370 (1996) 239-248
Report number:
  • FERMILAB-PUB-96-003-E
Experiments:

Citations per year

1996200320102017202405101520
Abstract: (Elsevier)
We have studied J ψ production in p p collisions at s = 1.8 TeV with the DØ detector at Fermilab using μ + μ − data. We have measured the inclusive J ψ production cross section as a function of J ψ transverse momentum, p T . For the kinematic range p T > 8 GeV/ c and |η| < 0.6 we obtain σ(p p → J ψ + X) · Br ( J ψ → μ + μ − ) = 2.08 ± 0.17( stat) ± 0.46(syst) nb. Using the muon impact parameter we have estimated the fraction of J ψ mesons coming from B meson decays to be f b = 0.35 ± 0.09(stat)±0.10(syst) and inferred the inclusive b production cross section. From the information on the event topology the fraction of nonisolated J ψ events has been measured to be f nonisol = 0.64 ± 0.08(stat)±0.06(syst). We have also obtained the fraction of J ψ events resulting from radiative decays of χ c states, f χ = 0.32 ± 0.07(stat)±0.07(syst). We discuss the implications of our measurements for charmonium production processes.
  • 13.85.Ni
  • D0
  • 14.65 Fy
  • Beauty
  • Charmonium
  • QCD
  • Tevatron
  • anti-p p: colliding beams
  • colliding beams: anti-p p
  • anti-p p: annihilation