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arXiv · 1005.2055

Reconciling the X(4630) with the Y(4660)

Feng-Kun Guo·Johann Haidenbauer·Christoph Hanhart·Ulf-G. Meißner
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Abstract

The Belle Collaboration observed an enhancement called X(4630) in the Lambda_c^+ Lambda_c^- mass distribution using initial state radiation. We demonstrate that the enhancement could be consistent with the psi'f_0(980) molecular picture of the Y(4660) taking into account the Lambda_c^+ Lambda_c^- final state interaction. To test the hypothesis that the X(4630) and Y(4660) are the same molecular state, we give predictions for its spin partner, the eta_c'f_0(980) molecule. High statistic measurements of the B decays into the K Lambda_c^+ Lambda_c^- and K eta_c' pi^+ pi^- are strongly recommended.

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Feng-Kun Guo, Johann Haidenbauer, Christoph Hanhart, Ulf-G. Meißner. 2010-05-12. Reconciling the X(4630) with the Y(4660). https://doi.org/10.1103/physrevd.82.094008

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