New molecular candidates: X(1910), X(2200), and X(2350)

TL;DR

This paper investigates the nature of the newly observed resonances X(1910), X(2200), and X(2350) as potential molecular states composed of vector mesons, using QCD sum rules to estimate their masses.

Contribution

It provides theoretical mass calculations supporting the interpretation of these resonances as molecular states of vector mesons, aligning with experimental data.

Findings

Mass estimates match experimental values

Supports molecular state interpretation

Identifies specific meson combinations for each resonance

Abstract

Assuming the newly observed resonant structures X(1910), X(2200), and X(2350) as $\omega\omega$, $\omega\phi$, and $\phi\phi$ molecular states respectively, we compute their mass values in the framework of QCD sum rules. The numerical results are $1.97\pm0.17 {GeV}$ for $\omega\omega$ state, $2.07\pm0.21 {GeV}$ for $\omega\phi$ state, and $2.18\pm0.29 {GeV}$ for $\phi\phi$ state, which coincide with the experimental values of X(1910), X(2200), and X(2350), respectively. This supports the statement that X(1910), X(2200), and X(2350) could be $\omega\omega$, $\omega\phi$, and $\phi\phi$ molecular candidates respectively.