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arXiv · 2309.17018

Near-threshold resonance in $e^{+}e^{-}\rightarrow\Lambda_{c}\bar{\Lambda}_{c}$ process

S. G. Salnikov·A. I. Milstein
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Abstract

We discuss the influence of various contributions of the $\Lambda_{c}\bar{\Lambda}_{c}$ potential on the energy dependence of the cross section $e^{+}e^{-}\rightarrow\Lambda_{c}\bar{\Lambda}_{c}$ near the threshold. New BESIII experimental data on the cross section and electromagnetic form factors $G_{E}$ and $G_{M}$ are taken into account. Our predictions are in good agreement with experimental data. We predict a bound state of $\Lambda_{c}\bar{\Lambda}_{c}$ at energy $\sim 38~\textrm{MeV}$ below the threshold that may manifest itself in anomalous behavior of light meson production cross sections in a given energy region.

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S. G. Salnikov, A. I. Milstein. 2023-09-29. Near-threshold resonance in $e^{+}e^{-}\rightarrow\Lambda_{c}\bar{\Lambda}_{c}$ process. https://doi.org/10.1103/physrevd.108.l071505

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