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arXiv · 2401.16112

Photoproduction of the $X(3872)$ beyond vector meson dominance: the open-charm coupled-channel mechanism

Xiong-Hui Cao·Meng-Lin Du·Feng-Kun Guo
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Abstract

Hidden-charm exotic hadrons will be searched for and investigated at future electron-ion colliders. For instance, the $X(3872)$ can be produced through the exclusive process $\gamma p\to X(3872)p$. The vector meson dominance model has been commonly employed in estimating the cross sections of such processes. However, the coupled-channel production mechanism through open-charm meson-baryon intermediate states may play a crucial role. To assess the significance of such contributions, we estimate the cross section of the $\gamma p\to X(3872)p$ reaction assuming the coupled-channel mechanism. For energies near the threshold, the total cross section is predicted to be of tens of nanobarns for $\gamma p\to X(3872)p$, which can be measured at future experimental facilities. Furthermore, the open-charm coupled-channel mechanism leads to a distinct line shape of the total cross section that can be utilized to reveal the production dynamics.

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Xiong-Hui Cao, Meng-Lin Du, Feng-Kun Guo. 2024-01-29. Photoproduction of the $X(3872)$ beyond vector meson dominance: the open-charm coupled-channel mechanism. https://doi.org/10.1088/1361-6471%2Fad6fbc

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