We compute the octet baryon charge radii to $\mathcal{O}(1/{\Lambda }_{\chi }^2{M}_N)$ in heavy baryon chiral perturbation theory $\left(\mathrm{HB}\chi \mathrm{PT}\right).\mathrm{}$ We examine the effect of including the decuplet of spin-$\frac{3}{2}$ baryons explicitly. We find that it does not improve the level of agreement between the $\mathrm{HB}\chi \mathrm{PT}$ and experimental values for the ${\Sigma }^{-}$ charge radius.

• Received 16 August 2000

DOI:https://doi.org/10.1103/PhysRevD.63.034014