Production of χc1 and χc2 in pp¯ Collisions at s=1.8TeV

T. Affolder et al. (CDF Collaboration)
Phys. Rev. Lett. 86, 3963 – Published 30 April 2001
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Abstract

We have measured the ratio of prompt production rates of the charmonium states χc1 and χc2 in 110pb1 of pp¯ collisions at s=1.8TeV. The photon from their decay into J/ψγ 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 σχc2σχc1=0.96±0.27(stat)±0.11(syst) for events with pT(J/ψ)>4.0GeV/c, |η(J/ψ)|<0.6, and pT(γ)>1.0GeV/c.

  • Received 30 October 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.3963

©2001 American Physical Society

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Vol. 86, Iss. 18 — 30 April 2001

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