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Production of heavy quarkonia in hadronic experiments

  • Elementary Particles and Fields
  • Theory
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Abstract

The phenomenology of the production of P-wave χ c,b mesons and S-wave η c,b mesons in highenergy hadron–hadron collisions was studied on the basis of nonrelativistic quantum chromodynamics (NRQCD). Available experimental data on χ c -meson production were analyzed, and nonperturbative NRQCDmatrix elements were determined from a fit to these data. It is shown that the observed transversemomentum (pT) spectrum of χ c mesons is basically formed by color-singlet contributions. At the same time, the ratio σ(χ c2)/σ(χ c1) depends greatly on color-octet contributions; this ratio therefore becomes a highly sensitive tool for separating different NRQCD contributions. Predictions for χ b -meson production are obtained on the basis of NRQCD scaling rules. For the case of η c -meson production, it is shown that the observed cross sections agree with the color-singlet model featuring phenomenological parameters.

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Authors and Affiliations

  1. Institute for High Energy Physics, National Research Center Kurchatov Institute, pl. Nauki 1, Protvino, Moscow Oblast, 142280, Russia

    A. K. Likhoded, A. V. Luchinsky & S. V. Poslavsky

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  1. A. K. Likhoded
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  2. A. V. Luchinsky
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  3. S. V. Poslavsky
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Correspondence to A. K. Likhoded.

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Original Russian Text © A.K. Likhoded, A.V. Luchinsky, S.V. Poslavsky, 2015, published in Yadernaya Fizika, 2015, Vol. 78, No. 12, pp. 1119–1128.

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Likhoded, A.K., Luchinsky, A.V. & Poslavsky, S.V. Production of heavy quarkonia in hadronic experiments. Phys. Atom. Nuclei 78, 1056–1065 (2015). https://doi.org/10.1134/S1063778815090100

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