Exclusion of $c\bar c$ Interpretation for $X(3940)$

TL;DR

This study evaluates the decay widths of the $X(3940)$ assuming it is a charmonium state using the $^3P_0$ model, and finds it unlikely to be a $car c$ meson based on the results.

Contribution

It demonstrates that the $X(3940)$ cannot be easily explained as a $car c$ state within the potential quark model and $^3P_0$ dynamics.

Findings

Unable to fit $X(3940)$ as a $car c$ meson

Model parameters fixed by other reactions

Challenges to the charmonium interpretation of $X(3940)$

Abstract

Partial decay widths of the $X(3940)$ are evaluated in the $^3P_0$ quark model, assuming a charmonium scenario for its structure. In the study all model parameters are predetermined by other reactions. The work reveals that it is difficult to accommodate the $X(3940)$ with any $c\bar c$ meson state in the picture of the potential quark model plus the $^3P_0$ quark dynamics.