Associative production of <i>J/ψ</i> - mesons and direct photons at the energy of the NICA collider
The article considers the associated production of J/ψ -mesons and direct photons at the energy of the NICA collider, s = 27 GeV, in the Generalized Parton Model in the leading order of perturbation theory of the quantum chromodynamics. Hadronization of a pair of cc¯-quarks to a J/ψ -meson is descri...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Samara National Research University
2023-11-01
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| Series: | Вестник Самарского университета: Естественнонаучная серия |
| Subjects: | |
| Online Access: | https://journals.ssau.ru/est/article/viewFile/24887/9831 |
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| Summary: | The article considers the associated production of J/ψ -mesons and direct photons at the energy of the NICA collider, s = 27 GeV, in the Generalized Parton Model in the leading order of perturbation theory of the quantum chromodynamics. Hadronization of a pair of cc¯-quarks to a J/ψ -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/ψ -mesons obtained at energies from s=19 up to s=200 GeV. It is shown that the processes of the associative production of J/ψ+ γ can be used to study of gluon distribution functions depending on the transverse momentum in a proton. |
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| ISSN: | 2541-7525 2712-8954 |