Charmonium decays into ${\Lambda }_c{\bar{\Lambda }}_c$ pair governed by the hadronic loop mechanism

Abstract

In this work, we investigate the open-charm decay process $\psi \to {\Lambda }_c{\bar{\Lambda }}_c$ via the hadronic loop mechanism for vector charmonia above ${\Lambda }_c{\bar{\Lambda }}_c$ threshold. The branching ratios of these vector charmonium states to ${\Lambda }_c{\bar{\Lambda }}_c$ are estimated. The charmonium explanation of the $Y(4630)$ observed in $e^{+}{e}^{-}\to {\Lambda }_c{\bar{\Lambda }}_c$ is tested. Furthermore, for the predicted higher vector charmonia above 4.7 GeV, the branching ratios $\mathcal{B}[\psi (nS)\to {\Lambda }_c{\bar{\Lambda }}_c]$ with $n=7,8,9$ are found to be of the order of magnitude of $10^{-4}-10^{-3}$ while $\mathcal{B}[\psi (mD)\to {\Lambda }_c{\bar{\Lambda }}_c]$ with $m=6,7,8$ are of the order of magnitude of $10^{-3}-10^{-2}$. The experimental signals of these missing charmonium states are discussed. The search for them may be an interesting topic in the future BESIII and Belle II experiments.

arXiv comment8 pages, 6 figures and 4 tables. Accepted by Phys. Rev. D

References in corpus (45)

• The $XYZ$ states: experimental and theoretical status and perspectives
• Pentaquark and Tetraquark states
• Phenomenology of Heavy Meson Chiral Lagrangians
• Future Physics Programme of BESIII
• Final State Interactions in Hadronic B Decays
• Higher Charmonia and X,Y,Z states with Screened Potential
• Hadro-Charmonium
• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
• The Vector and Axial-Vector Charmonium-like States
• Form Factors and Strong Couplings of Heavy Baryons from QCD Light-Cone Sum Rules
• Excited heavy tetraquarks with hidden charm
• Measurement of $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\psi (2S)$ via Initial State Radiation at Belle
• Charmed Baryonium
• Evidence that the Y(4660) is a f_0(980)psi' bound state
• Golem95C: A library for one-loop integrals with complex masses
• $Z_b(10610)$ and $Z_b(10650)$ structures produced by the initial single pion emission in the ${\rm Y}(5S)$ decays
• Precision measurement of the $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$ cross section near threshold
• Possible Deuteron-like Molecular States Composed of Heavy Baryons
• Canonical Charmonium Interpretation for Y(4360) and Y(4660)
• Erratum: QCD sum rules study of the $J^{PC}=1^{--}$ charmonium $Y$ mesons
• Scalar Resonance Contributions to the Dipion Transition Rates of ${\rm Y}(4S,5S)$ in the re-scattering model
• QCD sum rules study of the $J^{PC}=1^{--}$ charmonium $Y$ mesons
• Study on contributions of hadronic loops to decays of $J/\psi \to$ vector $+$ pseudoscalar mesons
• The puzzle of excessive non-$D\bar{D}$ component of the inclusive $\psi (3770)$ decay and the long-distant contribution
• Towards a dynamical understanding of the non-$D\bar{D}$ decay of $\psi (3770)$
• Charged bottomonium-like states $Z_b(10610)$ and $Z_b(10650)$ and the ${\rm Y}(5S)\to {\rm Y}(2S){\pi }^{+}{\pi }^{-}$ decay
• Reconciling the X(4630) with the Y(4660)
• Peak shifts due to $B^{(\ast )}-{\bar{B}}^{(\ast )}$ rescattering in ${\rm Y}(5S)$ dipion transitions
• Dipion invariant mass distribution of the anomalous ${\rm Y}(1S){\pi }^{+}{\pi }^{-}$ and ${\rm Y}(2S){\pi }^{+}{\pi }^{-}$ production near the peak of ${\rm Y}(10860)$
• The $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state: Y(4260) or Y(4660)?
• ${\rm Y}(4S,5S)\to {\rm Y}(1S)\eta$ transitions in the rescattering model and the new BaBar measurement
• Are the $Y$ states around 4.6 GeV from $e^{+}{e}^{-}$ annihilation higher charmonia?
• Explaining the anomalous ${\rm Y}(5S)\to {\chi }_{bJ}\omega$ decays through the hadronic loop effect
• Exotic $1^{--}$ States in QCD Sum Rules
• Re-examining the $X(4630)$ resonance in the reaction $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$
• Discussions on the Line-shape of $X(4660)$ Resonance
• Resonance $Y(4660)$ as a vector tetraquark and its strong decay channels
• Prediction of anomalous ${\rm Y}(5S)\to {\rm Y}(1^3{D}_J)\eta$ transitions
• Relativistic theory of string breaking in QCD
• Final State Interactions in Hadronic B Decays
• Exploring the ${\rm Y}(6S)\to {\chi }_{bJ}\varphi$ and ${\rm Y}(6S)\to {\chi }_{bJ}\omega$ hidden-bottom hadronic transitions
• Theory of hadron decay into baryon-antibaryon final state
• Potential observation of the ${\rm Y}(6S)\to {\rm Y}(1^3{D}_J)\eta$ transitions at Belle II
• Proposal of searching for the ${\rm Y}(6S)$ hadronic decays into ${\rm Y}(nS)$ plus ${\eta }^{(\prime )}$
• A new decay mode of higher charmonium

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• Measurement of the Energy-Dependent Electromagnetic Form Factors of a Charmed Baryon
• Confirming the existence of a new higher charmonium $\psi (4500)$ by the newly released data of $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$
• Higher strangeonium decays into light flavor baryon pairs like $\Lambda \bar{\Lambda }$, $\Sigma \bar{\Sigma }$, and $\Xi \bar{\Xi }$