Photon-induced production of the exotic charged charmonium-like state $Z_c(3900)$ off nuclear targets and its internal structure
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866916978241830912 |
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| author | Paryev, E. Ya. |
| author_facet | Paryev, E. Ya. |
| contents | In this paper, we investigate the possibility to study the famous charged charmonium-like state $Z_c(3900)$ production off nuclear targets and its properties in inclusive photon-induced reactions near the kinematic threshold within the collision model based on the nuclear spectral function. The model accounts for its charged components $Z_c(3900)^{\pm}$ production in direct photon-nucleon interactions as well as three different popular scenarios for their internal structures: compact tetraquarks, molecules of the two open-charm mesons and mixtures of both of them. We calculate the absolute and relative excitation functions for production of $Z_c(3900)^{\pm}$ mesons on $^{12}$C and $^{184}$W target nuclei at initial photon energies of 9.0-17.5 GeV, the absolute momentum differential cross sections and their ratios for the $Z_c(3900)^{\pm}$ production off these target nuclei at laboratory polar angles of 0$^{\circ}$-10$^{\circ}$ and at photon energy of 14 GeV as well as the A-dependences of the ratios of the total cross sections for $Z_c(3900)^{\pm}$ production at photon energy of 14 GeV within the adopted scenarios for the $Z_c(3900)^{\pm}$ internal structures. We demonstrate that the absolute and relative observables considered show a certain sensitivity to the $Z_c(3900)^{\pm}$ internal structures which are by far the best known. Hence, they might be useful for the determination of these structures -- the issue which has attracted much attention in the hadron physics community -- from the comparison of them with the experimental data from the future high-precision experiments at the CEBAF facility. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_00944 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Photon-induced production of the exotic charged charmonium-like state $Z_c(3900)$ off nuclear targets and its internal structure Paryev, E. Ya. High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment Nuclear Theory In this paper, we investigate the possibility to study the famous charged charmonium-like state $Z_c(3900)$ production off nuclear targets and its properties in inclusive photon-induced reactions near the kinematic threshold within the collision model based on the nuclear spectral function. The model accounts for its charged components $Z_c(3900)^{\pm}$ production in direct photon-nucleon interactions as well as three different popular scenarios for their internal structures: compact tetraquarks, molecules of the two open-charm mesons and mixtures of both of them. We calculate the absolute and relative excitation functions for production of $Z_c(3900)^{\pm}$ mesons on $^{12}$C and $^{184}$W target nuclei at initial photon energies of 9.0-17.5 GeV, the absolute momentum differential cross sections and their ratios for the $Z_c(3900)^{\pm}$ production off these target nuclei at laboratory polar angles of 0$^{\circ}$-10$^{\circ}$ and at photon energy of 14 GeV as well as the A-dependences of the ratios of the total cross sections for $Z_c(3900)^{\pm}$ production at photon energy of 14 GeV within the adopted scenarios for the $Z_c(3900)^{\pm}$ internal structures. We demonstrate that the absolute and relative observables considered show a certain sensitivity to the $Z_c(3900)^{\pm}$ internal structures which are by far the best known. Hence, they might be useful for the determination of these structures -- the issue which has attracted much attention in the hadron physics community -- from the comparison of them with the experimental data from the future high-precision experiments at the CEBAF facility. |
| title | Photon-induced production of the exotic charged charmonium-like state $Z_c(3900)$ off nuclear targets and its internal structure |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2506.00944 |