Chiral Lagrangian with higher resonances and flavour $SU(3)$ breaking

A chiral Lagrangian with $SU(3)$ breaking and higher resonances is proposed. In this model, the $SU(3)$ breaking structure in vector-pseudoscalar sector is realized with the decay constants of pseudoscalar mesons and the masses of vector mesons used as inputs. We examine whether the resulting $SU(3)$ breaking effect in the charge radii of pseudoscalar mesons is consistent with the experimental facts.