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arxiv: 1904.06130 · v1 · pith:XIBSPRFCnew · submitted 2019-04-12 · ✦ hep-ex · hep-ph· nucl-ex

Comment on the X(3915) nonstandard hadron candidate

classification ✦ hep-ex hep-phnucl-ex
keywords omegarightarrowcandidategammanonstandardprimeaddressassignment
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I review the experimental evidence for the $X(3915)$, the candidate nonstandard meson associated with $\omega J\psi$ resonance-like peaks in $B\rightarrow K\omega J\psi$ and $\gamma\gamma\rightarrow\omega J\psi$ near $M(\omega J\psi)=3920$~MeV, and address the conjecture that it can be identified as the $\chi_{c2}^\prime$, the radial excitation of the $\chi_{c2}$ charmonium state. Since the partial decay width for $B\rightarrow K X(3915)$ is at least an order-of-magnitude larger than that for $B\rightarrow K\chi_{c2}$, its assignment as the $\chi_{c2}^\prime$ is dubious.

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