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Physics
Associative production of $J/\psi$-mesons and direct photons at the energy of the NICA collider
L. E. Alimov, V. A. Saleev Samara National Research University, Samara, Russian Federation
(published under the terms of the Creative Commons Attribution 4.0 International License)
Abstract:
The article considers the associated production of $J/\psi$-mesons and direct photons at the energy of the NICA collider, $\sqrt s =27$ GeV, in the Generalized Parton Model in the leading order of perturbation theory of the quantum chromodynamics. Hadronization of a pair of $c\bar c$-quarks to a $J/\psi$-meson is described in terms of two approaches: the color singlet model and the color evaporation model. Nonperturbative parameters of the models are fixed from comparison with the available experimental data on inclusive production of $J/\psi$-mesons obtained at energies from $\sqrt s = 19$ up to $\sqrt s = 200$ GeV. It is shown that the processes of the associative production of $J/\psi + \gamma$ can be used to study of gluon distribution functions depending on the transverse momentum in a proton.
Keywords:
NICA, charmonium, $J/\psi$-meson, color singlet model, color evaporation model, hard process, generalized parton model, quantum chromodynamics.
Received: 12.04.2023 Revised: 22.05.2023 Accepted: 30.06.2023
Citation:
L. E. Alimov, V. A. Saleev, “Associative production of $J/\psi$-mesons and direct photons at the energy of the NICA collider”, Vestnik SamU. Estestvenno-Nauchnaya Ser., 29:2 (2023), 48–61
Linking options:
https://www.mathnet.ru/eng/vsgu702 https://www.mathnet.ru/eng/vsgu/v29/i2/p48
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Abstract page: | 41 | Full-text PDF : | 22 | References: | 8 |
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