Y(4140): Possible options

We discuss possible options for interpreting the newly observed state Y(4140) by the CDF collaboration in $B^+\to J/ψϕK^+$ decay above the $J/ψϕ$ threshold, and argue that it is more likely to be a $D_s^*$-$D_s^*$ molecular state or an exotic ($J^{PC}=1^{-+}$) hybrid charmonium. We have discussed decay modes which would allow unambiguous identification of the hybrid charmonium option.

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