Comment on the X(3915) nonstandard hadron candidate

Abstract

I review the experimental evidence for the $X(3915)$, the candidate nonstandard meson associated with $\omega J\psi$ resonance-like peaks in $B\to K\omega J\psi$ and $\gamma \gamma \to \omega J\psi$ 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 $B\to KX(3915)$ is at least an order-of-magnitude larger than that for $B\to K{\chi }_{c2}$, its assignment as the ${\chi }_{c2}^{\prime }$ is dubious.

6 page, 5 figures, to appear in the proceedings of "e+e- Collisions From Phi to Psi 2019," Novosibirsk, February 2019

References in corpus (4)

• Big-Bang Nucleosynthesis
• Excited and exotic charmonium spectroscopy from lattice QCD
• Could the $X(3915)$ and the $X(3930)$ Be the Same Tensor State?
• The XYZ mesons: what they aren't

Cited by in corpus (1)

• Spectrum of the Hidden-Bottom and the Hidden-Charm/Strange Exotics in the Dynamical Diquark Model