Production of ?qc1 and ?qc2 in pp? collisions at ??s = 1.8 TeV
Journal
Physical Review Letters
Journal Volume
86
Journal Issue
18
Pages
3963-3968
Date Issued
2001
Author(s)
Affolder, T. et al. (CDF Collaboration)
Abstract
We have measured the ratio of prompt production rates of the charmonium states chi(c1) and chi(c2) in 110 pb(-1) of pp collisions at sqrt[s] = 1.8 TeV. The photon from their decay into J/psi(gamma) is reconstructed through conversion into e+e- pairs. The energy resolution this technique provides makes the resolution of the two states possible. We find the ratio of production cross sections sigma(chi(c2))/sigma(chi(c1)) = 0.96+/-0.27(stat)+/-0.11(syst) for events with pT(J/psi) > 4.0 GeV/c, /eta(J/psi)/ 1.0 GeV/c.
Type
journal article