| The positive parity scalar $D^*_{s0}$(2317) and axial-vector $D^*_{s1}$(2460) charmed strange mesonsare generated by coupled-channel dynamics through the s-wave scattering of Goldstone
bosons off the pseudoscalar and vector D(Ds)-meson ground states. The attraction lea-
ding to the specific masses of these states reflects the chiral symmetry breaking scale
which characterizes the Weinberg-Tomozawa interaction in the chiral Lagrangian. Chiral corrections to order $Q^2_x$ are calculated and found to be small. The $D*_{s0}$(2317) and $D*_{s1}$(2460) mesons decay either strongly into the isospin-violating $\\pi^0 D_s$ and $\\pi^0 D*_s$ channels or electromagnetically. We show that the $\\pi^0-\\eta$ and $(K^{0}D^{+}-K^{+}D^0)$ mixings act constructively to generate strong widths of the order of 140 keV. The one-loop contribution to the radiative decay amplitudes of scalar and axial-vector states is calculated using the electromagnetic Lagrangian to chiral order $Q^2_x$. We show the importance of taking into account processes involving light vector mesons explicitly in the dynamics of electromagnetic decays to obtain a satisfactory description of the available data. |
