Re-examining the $X(4630)$ resonance in the reaction $e^{+}{e}^{-}\to {\mathrm{\Lambda }}_c^{+}{\overline{\mathrm{\Lambda }}}_c^{-}$

The reaction $e^{+}{e}^{-}\to {\mathrm{\Lambda }}_c^{+}{\overline{\mathrm{\Lambda }}}_c^{-}$ is investigated at energies close to the threshold with emphasis on the role played by the $X(4630)$ resonance. The interaction in the final ${\mathrm{\Lambda }}_c^{+}{\overline{\mathrm{\Lambda }}}_c^{-}$ system, constructed within chiral effective field theory and supplemented by a pole diagram that represents a bare $X(4630)$ resonance, is taken into account rigorously. The pole parameters of the $X(4630)$ are extracted and found to be compatible with the ones of the $X(4660)$ resonance that have been established in the reaction $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\psi (2S)$. The actual result for the $X(4630)$ is $M=(4652.5\pm 3.4)\mathrm{MeV}$ and $\mathrm{\Gamma }=(62.6\pm 5.6)\mathrm{MeV}$. Predictions for the ${\mathrm{\Lambda }}_c^{+}$ electromagnetic form factors in the timelike region are presented.