Reconciling the X(4630) with the Y(4660)
Abstract
The Belle Collaboration observed an enhancement called X(4630) in the Lambdac+ Lambdac- mass distribution using initial state radiation. We demonstrate that the enhancement could be consistent with the psi'f0(980) molecular picture of the Y(4660) taking into account the Lambdac+ Lambdac- 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 etac'f0(980) molecule. High statistic measurements of the B decays into the K Lambdac+ Lambdac- and K etac' pi+ pi- are strongly recommended.
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