Explanation of Y(4630) as hadronic resonant state

Abstract

After Y(4630) is discovered, theorists have given various explanations. We find that if Y(4630) is interpreted as the D-wave resonant state of ${\Lambda }_c{\bar{\Lambda }}_c$ system, the particle mass, decay width and all quantum numbers are consistent with experimental observations. We use the Bonn approximation to get the interaction potential of one boson exchange model, then extend the complex scaling method (CSM) to calculate the bound and resonant states. The results indicate that the ${\Lambda }_c{\bar{\Lambda }}_c$ system can form not only the bound state of S wave, but also the resonant state of the high angular momentum, and the ${}^3{D}_1$ wave resonant state can explain the structure of Y(4630) very well.

8 pages, 9 figures, accepted by Chinese Physics C

References in corpus (12)

• 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
• Hadronic Molecular States Composed of Heavy Flavor Baryons
• The Spin-orbit force, recoil corrections and possible $B{\bar{B}}^{\ast }$ and $D{\bar{D}}^{\ast }$ molecular states
• The $\mathbf{S}-\mathbf{D}$ mixing and di-electron widths of higher charmonium $1^{--}$ states
• Prediction of triple-charm molecular pentaquarks
• Double-charm tetraquark under the complex scaling method
• $S$-wave fully charmed tetraquark resonant states
• Relativistic extension of the complex scaling method
• Possible psi(5S), psi(4D), psi(6S) and psi(5D) signals in Lambda(c)-antiLambda(c)
• Probing double hadron resonances by the complex scaling method