# Comment on the X(3915) nonstandard hadron candidate

## TL;DR

This paper reviews experimental evidence for the X(3915) meson candidate, questioning its classification as a charmonium state due to decay width inconsistencies and suggesting it may not be a standard meson.

## Contribution

It critically assesses the X(3915) as a nonstandard meson candidate and challenges its identification as the radially excited _{c2} state based on decay width analysis.

## Key findings

- The decay width for BK X(3915) is much larger than for BK _{c2}.
- The evidence does not support X(3915) as the _{c2}^ state.
- X(3915) likely not a standard charmonium meson.

## Abstract

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.