The electromagnetic form factors and spin polarization of $\Lambda_c^+$ in the process $e^+ e^- \to \Lambda^+_c \bar{\Lambda}^-_c$

Cheng Chen; Bing Yan; Ju-Jun Xie

doi:10.1088/1674-1137/ad9259

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arXiv · 2407.19445

The electromagnetic form factors and spin polarization of $\Lambda_c^+$ in the process $e^+ e^- \to \Lambda^+_c \bar{\Lambda}^-_c$

Cheng Chen·Bing Yan·Ju-Jun Xie

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Abstract

The total cross sections of the process $e^+ e^-\to \Lambda_c^+ \bar{\Lambda}_c^-$ close to the threshold are calculated within the vector meson dominance model. It is found that the theoretical results can describe the current experimental measurements. In particular, the results for the angular distribution parameters about the differential cross section are consistent with the experiments from BESIII Collaboration. In addition, the relative phase $\Delta \Phi$ of the electromagnetic form factors was given, and the spin polarization of $\Lambda_c^+$ is predicted at center-mass energy $4.7 \ \rm GeV$. It is hopeful to provide a new perspective on the characteristics of the charmed baryon $\Lambda_c^+$.

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Cheng Chen, Bing Yan, Ju-Jun Xie. 2024-07-28. The electromagnetic form factors and spin polarization of $\Lambda_c^+$ in the process $e^+ e^- \to \Lambda^+_c \bar{\Lambda}^-_c$. https://doi.org/10.1088/1674-1137%2Fad9259

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