Large-basis meson wave functions, built from static cavity quarks and gluons, are used in conjunction with a simple plane-wave projection prescription to calculate meson charge radii with $O\left(g^2\right)$ corrections. After fitting to the light-meson mass spectrum the pion charge radius is used to constrain the remaining degree of freedom of the model parameters. The resulting large-basis model is found to give the following mass predictions in the light-quark sector: $K^{*}\mathrm{}\left(892\right)=904.4\mathrm{}\pm 0.1$ MeV, $\phi \mathrm{}\left(1020\right)=1040.6\mathrm{}\pm 0.1$ MeV. For the kaon charge radius we obtain ${〈r^2〉}_K=0.35\mathrm{}\pm 0.040$ ${\mathrm{fm}}^2$ (${〈r^2〉}_K^{\mathrm{expt}}=0.34\mathrm{}\pm 0.05$ ${\mathrm{fm}}^2$).

• Received 26 August 1988

DOI:https://doi.org/10.1103/PhysRevD.40.145