Y(4143) is probably a molecular partner of Y(3930)

Abstract

After discussing the various possible interpretations of the Y(4143) signal observed by the CDF collaboration in the $J/\psi \varphi$ mode, we tend to conclude that Y(4143) is probably a $D_s^{\ast }{\bar{D}}_s^{\ast }$ molecular state with $J^{PC}=0^{++}$ or $2^{++}$ while Y(3930) is its $D^{\ast }{\bar{D}}^{\ast }$ molecular partner as predicted in our previous work (arXiv:0808.0073). Both the hidden-charm and open charm two-body decays occur through the rescattering of the vector components within the molecular states while the three- and four-body open charm decay modes are forbidden kinematically. Hence their widths are narrow naturally. CDF, Babar and Belle collaborations may have discovered heavy molecular states already. We urge experimentalists to measure their quantum numbers and explore their radiative decay modes in the future.

6 pages, 1 table, 4 figures

References in corpus (4)

• Evidence for a Narrow Near-Threshold Structure in the $J/\psi \varphi$ Mass Spectrum in $B^{+}\to J/\psi \varphi K^{+}$ Decays
• X(3872) and Other Possible Heavy Molecular States
• New Hadron States
• The Hidden Charm Decay of $X(3872),Y(3940)$ and Final State Interaction Effects

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