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

Abstract

The reaction $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$ is investigated at energies close to the threshold with emphasis on the role played by the $X(4630)$ resonance. The interaction in the final ${\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$ 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 $M=(4652.5\pm 3.4)$ MeV and $\Gamma =(62.6\pm 5.6)$ MeV. Predictions for the ${\Lambda }_c^{+}$ electromagnetic form factors in the timelike region are presented.

11 pages, 3 figures

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• The electromagnetic form factors of the proton in the timelike region
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• Energy-dependent partial-wave analysis of all antiproton-proton scattering data below 925 MeV/c
• Possible psi(5S), psi(4D), psi(6S) and psi(5D) signals in Lambda(c)-antiLambda(c)
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Cited by in corpus (19)

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• Measurements of Sigma+ and Sigma- Time-like Electromagnetic Form Factors for center-of-mass energies from 2.3864 to 3.0200 GeV
• Hyperon electromagnetic form factors in the timelike region
• Measurement of the Energy-Dependent Electromagnetic Form Factors of a Charmed Baryon
• Are the $Y$ states around 4.6 GeV from $e^{+}{e}^{-}$ annihilation higher charmonia?
• Probing the internal structure of baryons
• Toy model to understand oscillatory behavior in timelike nucleon form factors
• New insights into the oscillation of the nucleon electromagnetic form factors
• Production and decay of polarized hyperon-antihyperon pairs
• Resonance $X(4630)$
• $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$ cross sections and the ${\Lambda }_c^{+}$ electromagnetic form factors within the extended vector meson dominance model
• Final-state interaction in the process $e^{+}{e}^{-}\to {\Lambda }_c{\bar{\Lambda }}_c$
• Structure around $p\bar{p}$ threshold in $J/\psi$ radiative decays
• The electromagnetic form factors and spin polarization of ${\Lambda }_c^{+}$ in the process $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$
• Light meson emissions of the selected charmonium-like states within compact tetraquark configurations
• Charmonium decays into ${\Lambda }_c{\bar{\Lambda }}_c$ pair governed by the hadronic loop mechanism
• Study of the $Y(4660)$ from a light-quark perspective
• Nature of $X(3872)$ from the line shape