Y(4140): Possible options

TL;DR

This paper explores possible interpretations of the Y(4140) particle, proposing it could be a molecular state or an exotic hybrid charmonium, and discusses decay modes for identification.

Contribution

It introduces potential models for Y(4140) and suggests experimental decay modes to distinguish between molecular and hybrid charmonium interpretations.

Findings

Y(4140) may be a D_s^*-D_s^* molecular state

Y(4140) could be an exotic hybrid charmonium with J^{PC}=1^{-+}

Decay modes can help identify the true nature of Y(4140)

Abstract

We discuss possible options for interpreting the newly observed state Y(4140) by the CDF collaboration in $B^+\to J/\psi\phi K^+$ decay above the $J/\psi\phi$ 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.