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arXiv · hep-ex/0211033

J-ψProduction via χ_c Decays in 920 GeV pA Interactions

B Collaboration
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Abstract

Using data collected by the HERA-B experiment, we have measured the fraction of Jψ's produced via radiative chi_c decays in interactions of 920 GeV protons with carbon and titanium targets. We obtained R_{χ_c} = 0.32 \pm 0.06_{stat} \pm 0.04_{sys} for the fraction of Jψfrom chi_c decays averaged over proton-carbon and proton-titanium collisions. This result is in agreement with previous measurements and is compared with theoretical predictions.

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B Collaboration. 2002-11-20. J-ψProduction via χ_c Decays in 920 GeV pA Interactions. https://doi.org/10.1016/s0370-2693(03)00407-6

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