Quarkonium production in an improved color evaporation model

Ma, Yan-Qing; Vogt, Ramona

doi:10.1103/PhysRevD.94.114029

Title: Quarkonium production in an improved color evaporation model

Journal Article · Tue Dec 27 00:00:00 EST 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.94.114029· OSTI ID:1366931

Ma, Yan-Qing ^[1]; Vogt, Ramona ^[2]

Peking Univ., Beijing (China). School of Physics. State Key Lab. of Nuclear Physics and Technology. Center for High Energy Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear and Chemical Sciences Division; Univ. of California, Davis, CA (United States). Physics Dept.

In this paper, we propose an improved version of the color evaporation model to describe heavy quarkonium production. In contrast to the traditional color evaporation model, we impose the constraint that the invariant mass of the intermediate heavy quark-antiquark pair be larger than the mass of produced quarkonium. We also introduce a momentum shift between the heavy quark-antiquark pair and the quarkonium. Finally, numerical calculations show that our model can describe the charmonium yields as well as the ratio of ψ' over J/ψ better than the traditional color evaporation model.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC52-07NA27344; SC0004014

OSTI ID:: 1366931

Alternate ID(s):: OSTI ID: 1338113

Report Number(s):: LLNL-JRNL-702881

Journal Information:: Physical Review D, Vol. 94, Issue 11; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 63 works

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New factorization theory for heavy quarkonium production and decay Ma, Yan-Qing; Chao, Kuang-Ta Physical Review D, Vol. 100, Issue 9 https://doi.org/10.1103/physrevd.100.094007	journal	November 2019
Diffractive quarkonium photoproduction in $p p$ and $p A$ collisions at the LHC: Predictions of the resolved Pomeron model for the Run 2 energies Gonçalves, V. P.; Martins, L. S.; Moreira, B. D. Physical Review D, Vol. 96, Issue 7 https://doi.org/10.1103/physrevd.96.074029	journal	October 2017
Photoproduction of J / ψ with forward hadron tagging in hadronic collisions Physical Review D, Vol. 99, Issue 11 https://doi.org/10.1103/physrevd.99.114026	journal	June 2019
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