Near-threshold resonance in $e^{+}{e}^{-}\to {\Lambda }_c{\bar{\Lambda }}_c$ process

Abstract

We discuss the influence of various contributions of the ${\Lambda }_c{\bar{\Lambda }}_c$ potential on the energy dependence of the cross section $e^{+}{e}^{-}\to {\Lambda }_c{\bar{\Lambda }}_c$ 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 $\sim 38\text{MeV}$ below the threshold that may manifest itself in anomalous behavior of light meson production cross sections in a given energy region.

arXiv comment5 pages, 1 figure

References in corpus (38)

• Observation of a near-threshold enhancement in th p pbar mass spectrum from radiative J/psi-->gamma p pbar decays
• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
• Study of e+e- --> p anti-p via initial-state radiation at BABAR
• Study of e+e- --> Lambda anti-Lambda, Lambda anti-Sigma0, Sigma0 anti-Sigma0 using Initial State Radiation with BABAR
• Measurement of the e+e- --> b anti-b cross section between sqrt(S)=10.54 and 11.20 GeV
• Spin-Parity Analysis of ppbar Mass Threshold Structure in J/psi and psi' Radiative Decays
• Precision measurement of the $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$ cross section near threshold
• New Features in the Electromagnetic Structure of the Neutron
• The electromagnetic form factors of the proton in the timelike region
• Observation of a cross-section enhancement near mass threshold in $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$
• Study of psi(2S) Decays to gamma p bar{p}, pi^0 p bar{p} and eta p bar{p} and Search for p bar{p} Threshold Enhancements
• Study of the process $e^{+}{e}^{-}\to n\bar{n}$ at the VEPP-2000 $e^{+}{e}^{-}$ collider with the SND detector
• Measurement of the e+e- --> p anti-p cross section in the energy range from 3.0 to 6.5 GeV
• Study of the process $e^{+}{e}^{-}\to p\bar{p}$ in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector
• X(3872) in the molecular model
• Study of N* Production from J/Psi--> p pbar eta
• The electromagnetic form factors of the $\Lambda$ in the timelike region
• On the near-threshold $\bar{p}p$ invariant mass spectrum measured in $J/\psi$ and ${\psi }^{\prime }$ decays
• Study of the process $e^{+}{e}^{-}\to p\bar{p}$ via initial state radiation at BESIII
• Hyperon electromagnetic form factors in the timelike region
• Study of Jψdecaying into ωp \bar p
• Observation of a Fine Structure in $e^{+}{e}^{-}\to$ hadrons Production at the Nucleon-antinucleon Threshold
• Partial wave analysis of J/psi to p pbar pi0
• Study of $J/\psi \to \omega p\bar{p}$ at BESIII
• Observation of a near-threshold enhancement in the $\Lambda \bar{\Lambda }$ mass spectrum from $e^{+}{e}^{-}\to \varphi \Lambda \bar{\Lambda }$ at $\sqrt{s}$ from 3.51 to 4.60 GeV
• Real and virtual $N\bar{N}$ pair production near the threshold
• $N\bar{N}$ production in $e^{+}{e}^{-}$ annihilation near the threshold revisited
• Fine structure of the cross sections of $e^{+}{e}^{-}$ annihilation near the thresholds of $p\bar{p}$ and $n\bar{n}$ production
• Isoscalar amplitude dominance in $e^{+}e-$ annihilation to $N\bar{N}$ pair close to the threshold
• Interaction of real and virtual $p\bar{p}$ pairs in $J/\psi \to p\bar{p}\gamma (\rho ,\omega )$ decays
• Measurement of the energy dependence of the $e^{+}{e}^{-}\to B\bar{B}$, $B{\bar{B}}^{\ast }$ and $B^{\ast }{\bar{B}}^{\ast }$ exclusive cross sections
• Coulomb effects in the decays ${\rm Y}(4S)\to B\bar{B}$
• Final-state interaction in the process $e^{+}{e}^{-}\to {\Lambda }_c{\bar{\Lambda }}_c$
• Angular distributions in $J/\psi \to p\bar{p}{\pi }^0(\eta )$ decays
• Natural explanation of recent results on $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$
• Coupled channels and production of near-threshold $B^{(\ast )}{\bar{B}}^{(\ast )}$ resonances in $e^{+}{e}^{-}$ annihilation
• $\Lambda \bar{\Lambda }$ final-state interaction in the reactions $e^{+}{e}^{-}\to \varphi \Lambda \bar{\Lambda }$ and $e^{+}{e}^{-}\to \eta \Lambda \bar{\Lambda }$
• Invariant-mass spectrum of $\Lambda \bar{\Lambda }$ pair in the process $e^{+}{e}^{-}\to \varphi \Lambda \bar{\Lambda }$

Cited by in corpus (3)

• Global coupled-channel analysis of $e^{+}{e}^{-}\to c\bar{c}$ processes in $\sqrt{s}=3.75-4.7$ GeV
• $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$ cross sections and the ${\Lambda }_c^{+}$ electromagnetic form factors within the extended vector meson dominance model
• Search for $e^{+}{e}^{-}\to \varphi {\chi }_{c0}$ and $\varphi {\eta }_{c2}(1D)$ at center-of-mass energies from 4.47 to 4.95 GeV