J/ψ and ψ\(2S\) Production in pp¯ Collisions at √s = 1.8 TeV
Abstract
We present a study of J/ψ and ψ\(2S\) production in pp¯ collisions, at s = 1.8 TeV with the CDF detector at Fermilab. The J/ψ and ψ\(2S\) mesons are reconstructed using their μ+μ- decay modes. We have measured the inclusive production cross section for both mesons as a function of their transverse momentum in the central region, \|η\|<0.6. We also measure the fraction of these events originating from b hadrons. We thus extract individual cross sections for J/ψ and ψ\(2S\) mesons from b-quark decays and prompt production. We find a large excess (approximately a factor of 50) of direct ψ\(2S\) production compared with predictions from the color singlet model.
- Publication:
-
Physical Review Letters
- Pub Date:
- July 1997
- DOI:
- 10.1103/PhysRevLett.79.572
- Bibcode:
- 1997PhRvL..79..572A