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Impact of $\eta_c$ hadroproduction data on charmonium production and polarization within NRQCD framework

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arxiv 1412.0508 v1 pith:NL4TBCCZ submitted 2014-12-01 hep-ph

classification hep-ph
keywords datapolarizationelementsgoodhadroproductionlhcblong-distancematrix
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

With the recent LHCb data on $\eta_c$ production and based on heavy quark spin symmetry, we obtain the long-distance matrix elements for both $\eta_c$ and $J/\psi$ productions, among which, the color-singlet one for $\eta_c$ is obtained directly by the fit of experiment for the first time. Using our long-distance matrix elements, we can provide good description of the $\eta_c$ and $J/\psi$ hadroproduction measurements. Our predictions on $J/\psi$ polarization are in good agreement with the LHCb data and pass through the two sets of CDF measurements in medium $p_t$ region. Considering all the possible uncertainties carefully, we obtained quite narrow bands of the $J/\psi$ polarization curves.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Probing Heavy-Quark Spin Symmetry in Double $J/\psi$ Hadroproduction

    hep-ph 2026-08 conditional novelty 8.0 of 10

    A complete O(alpha_s^5) NRQCD calculation for prompt J/psi pair hadroproduction finds LHC data fix one combination of color-octet LDMEs, yielding a set that tests heavy-quark spin symmetry via eta_c data.

  2. Next-to-next-to-leading-order QCD corrections to ${}^3S_1^{(8)}$ gluon fragmentation function for quarkonium

    hep-ph 2026-06 unverdicted novelty 8.0 of 10

    First NNLO QCD short-distance coefficients for the ³S₁⁽⁸⁾ gluon fragmentation function are obtained numerically to high precision, with analytic endpoint logarithms reconstructed for threshold resummation.

  3. How well does nonrelativistic QCD factorization work at next-to-leading order?

    hep-ph 2024-11 conditional novelty 6.0 of 10

    A single set of NRQCD color-octet matrix elements fitted to LHC J/psi and eta_c data predicts a wide range of quarkonium observables, including Upsilon(3S) production and low-momentum photoproduction, with residual fa...

  4. Double heavy quarkonia production with color-octet channels at Z factory and at the CEPC/FCC-ee

    hep-ph 2025-01 conditional novelty 5.0 of 10

    Color-octet channels are predicted to dominate many double heavy quarkonium production processes at future Z factories, with relativistic corrections suppressing charmonium rates by roughly a factor of two.

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