Exclusive $J/ψ$ photo-production on nuclei
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| Format: | Preprint |
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2024
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| author | Kim, Sang-Ho Lee, T. -S. H. Wiringa, R. B. |
| author_facet | Kim, Sang-Ho Lee, T. -S. H. Wiringa, R. B. |
| contents | Motivated by the recent experimental developments, the Pom-CQM model of the $γ+ N \to J/ψ+ N$ reaction of Lee et al. [Eur. Phys. J. A. 58, 252 (2022)] and Sakinah et al. [Phys. Rev. C. 109, 065204 (2024)] has been applied to predict the exclusive $J/ψ$ photo-production on nuclei ($A$). Within the multiple scattering theory, the calculations have been performed by including the impulse amplitude $T^{\rm IMP}_{J/ψA,γA}$ and the $J/ψ$-nucleus final state interaction (FSI) amplitude $T^{\rm FSI}_{J/ψA,γA}$. For the deuteron target, $T^{\rm IMP}_{J/ψd,γd}$ is calculated exactly using the wave function generated from the realistic nucleon-nucleon potentials. It is found that, near the threshold region, the $J/ψ$ photo-production cross sections depend sensitively on the $d$-state of the deuteron wave function. The FSI amplitude $T^{\rm FSI}_{J/ψA,γA}$ is calculated using the first-order optical potential constructed from the $J/ψ$-$N$ scattering amplitude generated from the employed Pom-CQM model. It turns out that the FSI has significant effects in the large momentum-transfer region. By using the conventional fixed scatter approximation (FSA) and the nuclear form factors from the variational Monte-Carlo (VMC) calculations of Lonardoni et al. [Phys. Rev.C. 96, 024326 (2017)], the cross sections of the $J/ψ$ photo-production on ${^4\rm He}$, ${^{16}\rm O}$, and ${^{40}\rm Ca}$ are also predicted for future experimental investigations at JLab and EIC. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_12187 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Exclusive $J/ψ$ photo-production on nuclei Kim, Sang-Ho Lee, T. -S. H. Wiringa, R. B. Nuclear Theory High Energy Physics - Phenomenology Motivated by the recent experimental developments, the Pom-CQM model of the $γ+ N \to J/ψ+ N$ reaction of Lee et al. [Eur. Phys. J. A. 58, 252 (2022)] and Sakinah et al. [Phys. Rev. C. 109, 065204 (2024)] has been applied to predict the exclusive $J/ψ$ photo-production on nuclei ($A$). Within the multiple scattering theory, the calculations have been performed by including the impulse amplitude $T^{\rm IMP}_{J/ψA,γA}$ and the $J/ψ$-nucleus final state interaction (FSI) amplitude $T^{\rm FSI}_{J/ψA,γA}$. For the deuteron target, $T^{\rm IMP}_{J/ψd,γd}$ is calculated exactly using the wave function generated from the realistic nucleon-nucleon potentials. It is found that, near the threshold region, the $J/ψ$ photo-production cross sections depend sensitively on the $d$-state of the deuteron wave function. The FSI amplitude $T^{\rm FSI}_{J/ψA,γA}$ is calculated using the first-order optical potential constructed from the $J/ψ$-$N$ scattering amplitude generated from the employed Pom-CQM model. It turns out that the FSI has significant effects in the large momentum-transfer region. By using the conventional fixed scatter approximation (FSA) and the nuclear form factors from the variational Monte-Carlo (VMC) calculations of Lonardoni et al. [Phys. Rev.C. 96, 024326 (2017)], the cross sections of the $J/ψ$ photo-production on ${^4\rm He}$, ${^{16}\rm O}$, and ${^{40}\rm Ca}$ are also predicted for future experimental investigations at JLab and EIC. |
| title | Exclusive $J/ψ$ photo-production on nuclei |
| topic | Nuclear Theory High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2411.12187 |