Exploring open-charm decay mode ${\Lambda }_c{\bar{\Lambda }}_c$ of charmonium-like state $Y(4630)$

Abstract

The newly observed $X,Y,Z$ exotic states are definitely not in the standard $Q{\bar{Q}}^{\prime }$ structures, thus their existence composes a challenge to our understanding on the fundamental principles of hadron physics. Therefore the studies on their decay patterns which are determined by the non-perturbative QCD will definitely shed light on the concerned physics. Generally the four-quark states might be in a molecular state or tetraquark or their mixture. In this work, we adopt the suggestion that $Y(4630)$ is a charmonium-like tetraquark made of a diquark and an anti-diquark. If it is true, its favorable decay mode should be $Y(4630)$ decaying into an open-charm baryon pair, since such a transition occurs via strong interaction and is super-OZI-allowed. In this work, we calculate the decay width of $Y(4630)\to {\Lambda }_c{\bar{\Lambda }}_c$ in the framework of the quark pair creation (QPC) model. Our numerical results on the partial width computed in the tetraquark configuration coincide with the Belle data within a certain error tolerance.

8 pages, 4 figures, 1 table. Accepted by Eur. Phys. J. C

References in corpus (28)

• Big-Bang Nucleosynthesis
• Observation of Two Resonant Structures in e+e- to pi+ pi- psi(2S) via Initial State Radiation at Belle
• Observation of the resonant character of the $Z(4430{)}^{-}$ state
• Spectroscopy and Regge trajectories of heavy baryons in the relativistic quark-diquark picture
• The Z(4430) and a New Paradigm for Spin Interactions in Tetraquarks
• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
• A New Picture for the Formation and Decay of the Exotic $XYZ$ Mesons
• Strong decays of charmed baryons
• Assignments of ${\Lambda }_Q$ and ${\Xi }_Q$ baryons in the heavy quark-light diquark picture
• $D_{sJ}(2860)$ and $D_{sJ}(2715)$
• Charmed-strange mesons revisited: mass spectra and strong decays
• Pionic Decays of $D_{sj}(2317)$, $D_{sj}(2460)$ and $B_{sj}(5718)$, $B_{sj}(5765)$
• Newly observed D_{sJ}(3040) and the radial excitations of P-wave charmed-strange mesons
• Newly observed D(2550), D(2610), and D(2760) as 2S and 1D charmed mesons
• The $\mathbf{S}-\mathbf{D}$ mixing and di-electron widths of higher charmonium $1^{--}$ states
• A tetraquark or not a tetraquark: A holography inspired stringy hadron (HISH) perspective
• The mass spectrum and strong decays of isoscalar tensor mesons
• $X(1835)$ and $\eta (1760)$ observed by the BES Collaboration
• Prediction of a missing higher charmonium around 4.26 GeV in $J/\psi$ family
• Possible psi(5S), psi(4D), psi(6S) and psi(5D) signals in Lambda(c)-antiLambda(c)
• The $\eta (2225)$ observed by the BES Collaboration
• Towards the assignment for the $4^1{S}_0$ meson nonet
• Rescattering effects in charmless B_{u,d,s} to P P decays
• Study on the rare decays of $Y(4630)$ induced by final state interactions
• Dipion decays of heavy baryons
• Angular momentum coefficients for meson strong decay and unquenched quark models
• A New Dynamical Picture for the Production and Decay of the $XYZ$ Mesons
• Phenomenological study of the isovector tensor meson family

Cited by in corpus (15)

• Pentaquark and Tetraquark states
• Spectroscopy of the hidden-charm $[qc][\bar{q}\bar{c}]$ and $[sc][\bar{s}\bar{c}]$ tetraquarks
• Doubly heavy tetraquarks in an extended chromomagnetic model
• A tetraquark or not a tetraquark: A holography inspired stringy hadron (HISH) perspective
• Measurement of the Energy-Dependent Electromagnetic Form Factors of a Charmed Baryon
• Deciphering the recently discovered tetraquark candidates around 6.9 GeV
• Discussions on the Line-shape of $X(4660)$ Resonance
• Strong decay properties of single heavy baryons ${\Lambda }_Q$, ${\Sigma }_Q$ and ${\Omega }_Q$
• The analysis of the excited bottom and bottom strange states $B_1(5721)$, $B_2^{\ast }(5747)$, $B_{s1}(5830)$, $B_{s2}^{\ast }(5840)$, $B_J(5840)$ and $B_J(5970)$ in B meson family
• Possible ${\Lambda }_c{\bar{\Lambda }}_c$ molecular states and their productions in nulceon-antinulceon collision
• Analysis of the $X(3842)$ as a D-wave charmonium meson
• A new decay mode of higher charmonium
• $Y(4626)$ as a $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state
• Light meson emissions of the selected charmonium-like states within compact tetraquark configurations
• Explanation of Y(4630) as hadronic resonant state